Carlson Cod Liver Oil Liquid Lemon 16.9oz: Are there any potential interactions with medications?

Carlson Cod Liver Oil Liquid Lemon 16.9oz contains Norwegian Arctic Cod Liver Oil. As with any cod liver oil supplement, consult your healthcare provider if you take prescription medications, especially blood thinners, blood pressure medications, or immunosuppressants. Carlson recommends consulting a doctor before use if you are on medication.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Are there any side effects from long-term use?

At 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU, Carlson Cod Liver Oil Liquid Lemon 16.9oz provides a clinically effective dose within the studied range of 1-2 tsp daily (1100-2200mg omega-3s). Long-term use at recommended doses is generally well-tolerated based on available research. Discontinue and consult a healthcare provider if you experience adverse effects.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Does it cause any digestive issues or side effects?

Liquid cod liver oil supplements may cause mild digestive discomfort initially. Carlson Cod Liver Oil Liquid Lemon 16.9oz is formulated as a liquid which is designed to be gentle on the stomach. Start with a lower dose if you have a sensitive stomach.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is this product safe for pregnant or nursing women?

Carlson does not specifically market Carlson Cod Liver Oil Liquid Lemon 16.9oz for pregnant or nursing women. If you are pregnant, nursing, or planning to become pregnant, consult your healthcare provider before taking any cod liver oil supplement. Clinical safety data during pregnancy is limited for most cod liver oil products.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is it safe to take with other supplements?

Carlson Cod Liver Oil Liquid Lemon 16.9oz can generally be combined with other supplements, but be mindful of total cod liver oil intake from all sources to stay within recommended daily limits (1-2 tsp daily (1100-2200mg omega-3s)). Carlson's third-party testing (IFOS Certified, IGEN Non-GMO) helps ensure purity and accurate labeling.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What is the recommended dosage?

The recommended dose is 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU. Clinical studies on cod liver oil typically use 1-2 tsp daily (1100-2200mg omega-3s). Carlson Cod Liver Oil Liquid Lemon 16.9oz provides a full clinical dose per serving. Follow the label directions or your healthcare provider's recommendation.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: When is the best time to take this?

Carlson Cod Liver Oil Liquid Lemon 16.9oz can be taken with or without food. Taking it with a meal may improve absorption and reduce any potential digestive discomfort. Consistency matters more than timing — take it at the same time daily.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Can I take more than the recommended dose?

The clinical dose range for cod liver oil is 1-2 tsp daily (1100-2200mg omega-3s). Carlson Cod Liver Oil Liquid Lemon 16.9oz provides 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU per serving. Do not exceed the recommended dose without consulting a healthcare provider. Higher doses have not been shown to provide proportionally greater benefits and may increase the risk of side effects.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: How long does one bottle last?

Carlson Cod Liver Oil Liquid Lemon 16.9oz contains 100 servings per container. At the recommended daily dose, one bottle lasts approximately 3 months. At $64.99, that's $0.28/serving — competitive value in this category.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What is the active ingredient and its source?

The active ingredient is Norwegian Arctic Cod Liver Oil. Carlson sources cod liver oil with attention to quality sourcing. The product undergoes IFOS Certified, IGEN Non-GMO to verify potency and purity.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Does it contain any artificial additives or fillers?

Carlson Cod Liver Oil Liquid Lemon 16.9oz is Non-GMO verified and is formulated as a liquid with Norwegian Arctic Cod Liver Oil as the primary active. Carlson has third-party verification (IFOS Certified, IGEN Non-GMO) for quality assurance. Check the full supplement facts panel on the label for the complete inactive ingredient list.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is the ingredient sourced sustainably?

Carlson does not prominently advertise specific sustainability certifications for this product. Cod liver oil is a widely cultivated ingredient with generally sustainable production methods.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What form of the ingredient is used?

Carlson Cod Liver Oil Liquid Lemon 16.9oz uses Norwegian Arctic Cod Liver Oil in liquid form. This delivers a full clinical dose of 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU. The liquid format allows for rapid absorption and flexible dosing.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: How long does it take to notice results?

Most users report noticing effects of cod liver oil supplementation within 2-4 weeks of consistent daily use, though this varies by individual. Cod liver oil benefits like cardiovascular and inflammatory markers may take 8-12 weeks to fully manifest. Give it at least 30 days before evaluating effectiveness.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: How does this compare to other brands?

Carlson Cod Liver Oil Liquid Lemon 16.9oz is rated 4.8 out of 5 stars with 11,887 reviews on Amazon. It's best for: Overall best cod liver oil — highest omega-3 dose with gold-standard purity testing. Key advantages include highest omega-3 content (1100mg epa+dha per tsp) and ifos five-star certified for purity. The main trade-off: liquid format requires refrigeration after opening and is less convenient than softgels for travel.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What do customer reviews say?

Carlson Cod Liver Oil Liquid Lemon 16.9oz has a 4.8-star rating from 11,887 reviews on Amazon. This is among the highest-rated products in this category. Third-party testing (IFOS Certified, IGEN Non-GMO) adds confidence beyond user reviews.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What size are the pills/capsules?

Carlson Cod Liver Oil Liquid Lemon 16.9oz comes in liquid form. This is not a pill/capsule — it's a liquid that can be measured and mixed. Contains 100 servings.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Does it have any taste or smell?

Carlson Cod Liver Oil Liquid Lemon 16.9oz has a mild flavor that blends easily into foods.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: How should this product be stored?

Store Carlson Cod Liver Oil Liquid Lemon 16.9oz in a cool, dry place away from direct sunlight. Refrigerate after opening to preserve freshness and prevent oxidation. Do not use if the safety seal is broken.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: What is the shelf life?

Check the expiration date printed on the Carlson Cod Liver Oil Liquid Lemon 16.9oz packaging. Most cod liver oil supplements have a shelf life of 2-3 years from manufacture when stored properly. Liquid forms may have a shorter shelf life once opened — typically 60-90 days refrigerated.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is this product vegan/vegetarian friendly?

Check the Carlson Cod Liver Oil Liquid Lemon 16.9oz label for capsule material and other ingredients to confirm vegan/vegetarian suitability. Gluten-free, Non-GMO (IGEN verified), No artificial preservatives

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is it gluten-free?

Yes, Carlson Cod Liver Oil Liquid Lemon 16.9oz is certified gluten-free.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Is this non-GMO?

Yes, Carlson Cod Liver Oil Liquid Lemon 16.9oz is Non-GMO verified.

Carlson Cod Liver Oil Liquid Lemon 16.9oz: Does Subscribe & Save offer additional savings?

Subscribe & Save is not currently available for this product. You can still save by watching for periodic Amazon deals or buying multiple bottles.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Are there any potential interactions with medications?

Nordic Naturals Arctic CLO Softgels Lemon 180ct contains Arctic Cod Liver Oil (Triglyceride Form). As with any cod liver oil supplement, consult your healthcare provider if you take prescription medications, especially blood thinners, blood pressure medications, or immunosuppressants. Nordic Naturals recommends consulting a doctor before use if you are on medication.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Are there any side effects from long-term use?

At 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU, Nordic Naturals Arctic CLO Softgels Lemon 180ct provides a moderate dose within the studied range of 3 softgels daily (750mg omega-3s). Long-term use at recommended doses is generally well-tolerated based on available research. Discontinue and consult a healthcare provider if you experience adverse effects.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Does it cause any digestive issues or side effects?

Cod liver oil softgels are generally well-tolerated. Nordic Naturals Arctic CLO Softgels Lemon 180ct is formulated as a softgel which is designed for easy digestion. Start with a lower dose if you have a sensitive stomach.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Is this product safe for pregnant or nursing women?

Nordic Naturals does not specifically market Nordic Naturals Arctic CLO Softgels Lemon 180ct for pregnant or nursing women. If you are pregnant, nursing, or planning to become pregnant, consult your healthcare provider before taking any cod liver oil supplement. Clinical safety data during pregnancy is limited for most cod liver oil products.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Is it safe to take with other supplements?

Nordic Naturals Arctic CLO Softgels Lemon 180ct can generally be combined with other supplements, but be mindful of total cod liver oil intake from all sources to stay within recommended daily limits (3 softgels daily (750mg omega-3s)). Nordic Naturals's third-party testing (Third-Party Tested (Certificate of Analysis available)) helps ensure purity and accurate labeling.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: What is the recommended dosage?

The recommended dose is 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU. Clinical studies on cod liver oil typically use 3 softgels daily (750mg omega-3s). Nordic Naturals Arctic CLO Softgels Lemon 180ct provides a partial dose — consider your total daily intake. Follow the label directions or your healthcare provider's recommendation.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: When is the best time to take this?

Fat-soluble cod liver oil supplements like Nordic Naturals Arctic CLO Softgels Lemon 180ct are best taken with a meal containing healthy fats for optimal absorption. Consistency matters more than timing — take it at the same time daily.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Can I take more than the recommended dose?

The clinical dose range for cod liver oil is 3 softgels daily (750mg omega-3s). Nordic Naturals Arctic CLO Softgels Lemon 180ct provides 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU per serving. Do not exceed the recommended dose without consulting a healthcare provider. Higher doses have not been shown to provide proportionally greater benefits and may increase the risk of side effects.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: How long does one bottle last?

Nordic Naturals Arctic CLO Softgels Lemon 180ct contains 60 servings per container. At the recommended daily dose, one bottle lasts approximately 2 months. At $42.46, that's $0.62/serving (3 softgels) — Subscribe & Save offers additional savings.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: What is the active ingredient and its source?

The active ingredient is Arctic Cod Liver Oil (Triglyceride Form). Nordic Naturals sources cod liver oil with attention to quality sourcing. The product undergoes Third-Party Tested (Certificate of Analysis available) to verify potency and purity.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Does it contain any artificial additives or fillers?

Nordic Naturals Arctic CLO Softgels Lemon 180ct is Non-GMO verified and is formulated as a softgel with Arctic Cod Liver Oil (Triglyceride Form) as the primary active. Nordic Naturals has third-party verification (Third-Party Tested (Certificate of Analysis available)) for quality assurance. Check the full supplement facts panel on the label for the complete inactive ingredient list.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: Is the ingredient sourced sustainably?

Nordic Naturals does not prominently advertise specific sustainability certifications for this product. Cod liver oil is a widely cultivated ingredient with generally sustainable production methods.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: What form of the ingredient is used?

Nordic Naturals Arctic CLO Softgels Lemon 180ct uses Arctic Cod Liver Oil (Triglyceride Form) in softgel form. This provides a meaningful dose of 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU. The softgel format protects the active ingredients and is easy to swallow.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: How long does it take to notice results?

Most users report noticing effects of cod liver oil supplementation within 2-4 weeks of consistent daily use, though this varies by individual. Cod liver oil benefits like cardiovascular and inflammatory markers may take 8-12 weeks to fully manifest. Give it at least 30 days before evaluating effectiveness.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: How does this compare to other brands?

Nordic Naturals Arctic CLO Softgels Lemon 180ct is rated 4.7 out of 5 stars with 2,802 reviews on Amazon. It's best for: Best softgel option — convenient format from the gold-standard fish oil brand. Key advantages include gold-standard brand reputation and triglyceride form for better absorption. The main trade-off: requires 3 softgels per serving, which increases cost per dose.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: What do customer reviews say?

Nordic Naturals Arctic CLO Softgels Lemon 180ct has a 4.7-star rating from 2,802 reviews on Amazon. This is among the highest-rated products in this category. Third-party testing (Third-Party Tested (Certificate of Analysis available)) adds confidence beyond user reviews.

Nordic Naturals Arctic CLO Softgels Lemon 180ct: What size are the pills/capsules?

Nordic Naturals Arctic CLO Softgels Lemon 180ct comes in softgel form. Nordic Naturals softgels are standard-sized for the category. If you have difficulty swallowing pills, softgels tend to be easier to swallow than tablets. Contains 60 servings.

Best Cod Liver Oil Supplements (2026)

· Updated April 2026

Lab Tested, Evidence Ranked

Supplement Science Editorial Team·Evidence-Based Supplement Research

Published Apr 1, 2026·Reviewed Apr 21, 2026

2,500+Clinical Studies Cited

6Cod Liver Oil products evaluated

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Our Verdict

The best cod liver oil supplement delivers 500-1000mg combined EPA+DHA per serving alongside naturally occurring vitamins A and D, with IFOS/IGEN purity certification.

Best By Category

#1Overall

Carlson Cod Liver Oil Liquid Lemon 16.9oz

Buy Nowon Amazon

#5Budget

NOW Foods Cod Liver Oil Extra Strength 1000mg 180ct

Buy Nowon Amazon

#2Best Softgels

Nordic Naturals Arctic CLO Softgels Lemon 180ct

Buy Nowon Amazon

#3Best Taste

Nordic Naturals Arctic CLO Liquid Orange 16oz

Buy Nowon Amazon

#4Sustainably Sourced

Garden of Life Dr. Formulated Alaskan CLO Liquid 6.76oz

Buy Nowon Amazon

The best cod liver oil provides 500-1000mg combined EPA+DHA per daily dose plus naturally present vitamins A and D,...

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We evaluated cod liver oil supplements on EPA+DHA content, Vitamin A and D levels, purity testing, freshness, and value per serving. Our recommendations prioritize third-party tested products from sustainable cod sources with transparent oxidation values.

As an Amazon Associate, we earn from qualifying purchases. Some links below are affiliate links — this doesn't affect our editorial independence or product ratings. How we evaluate products

How We Chose These Products

Products are ranked using our published scoring methodology — evidence strength, dose adequacy, ingredient form, third-party testing signals, value, and clean-label factors are weighted across the 5 criteria below. Commercial relationships do not determine our editorial rankings.

EPA+DHA Content

30%

Total omega-3 fatty acids per serving, specifically EPA and DHA. Higher combined doses provide greater cardiovascular and anti-inflammatory benefits per the Aung 2018 meta-analysis.

Vitamin A & D Content

20%

Cod liver oil's unique advantage is providing preformed retinol (vitamin A) and vitamin D3 alongside omega-3s. We evaluate whether levels are meaningful without exceeding safe upper limits.

Purity Testing (IFOS/Third-Party)

25%

IFOS five-star certification is the gold standard for fish oil purity, testing for heavy metals, PCBs, dioxins, and oxidation markers. Third-party testing from other labs is acceptable but less rigorous.

Freshness/Oxidation

15%

Oxidized fish oil may reduce benefits and cause fishy burps. We prioritize products with published totox (total oxidation) values below industry standards and nitrogen-flushed packaging.

Value per Serving

10%

Cost per serving adjusted for omega-3 content and vitamin levels. A $0.30/serving product with 1100mg omega-3s delivers better value than a $0.15/serving product with 170mg.

#1 Top Pick

Cod Liver Oil Liquid Lemon 16.9oz

Carlson

11,899 Amazon reviews

9.6/10

4.8

Delivers the highest EPA+DHA content (1100mg) of any cod liver oil tested, sourced from Norwegian Arctic cod and verified by IFOS five-star certification. The lemon flavor effectively masks fishiness, and nitrogen-flushed bottles maintain freshness. Provides meaningful vitamin A (850 IU) and D3 (400 IU) without approaching upper limits.

IngredientNorwegian Arctic Cod Liver Oil

Dose1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU

FormLiquid

TestingIFOS Certified, IGEN Non-GMO

1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IUClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.59/serving

Pros

Highest omega-3 content (1100mg EPA+DHA per tsp)
IFOS five-star certified for purity
Pleasant lemon flavor

Cons

Liquid requires refrigeration after opening
Less travel-friendly than softgels

Gluten-freeNon-GMO (IGEN verified)No artificial preservatives

Buy Nowon Amazon

Read full review →

Quick Comparison

#1Carlson Cod Liver Oil Liquid Lemon 16.9oz

9.6/10

Carlson

#1 Top Pick

11,899 Amazon reviews

Best for: Overall best cod liver oil — highest omega-3 dose with gold-standard purity testing

Norwegian Arctic Cod Liver Oil · 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU

Liquid · IFOS Certified, IGEN Non-GMO

$58.63

$0.59/serving

Buy Nowon Amazon

#2Nordic Naturals Arctic CLO Softgels Lemon 180ct

9/10

Nordic Naturals

2,802 Amazon reviews

Best for: softgel option — convenient format from the gold-standard fish oil brand

Arctic Cod Liver Oil (Triglyceride Form) · 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU

Softgel · Third-Party Tested (Certificate of Analysis available)

$42.46

$0.71/serving

Buy Nowon Amazon

#3Nordic Naturals Arctic CLO Liquid Orange 16oz

8.6/10

Nordic Naturals

2,945 Amazon reviews

Best for: Best-tasting liquid cod liver oil — orange flavor appeals to adults and children alike

Arctic Cod Liver Oil (Triglyceride Form) · 1060mg omega-3s per tsp + Vitamin A 750-1500 IU + Vitamin D 0-300 IU

Liquid · Third-Party Tested (Certificate of Analysis available)

$50.11

$0.52/serving

Buy Nowon Amazon

#4Garden of Life Dr. Formulated Alaskan CLO Liquid 6.76oz

8.4/10

Garden of Life

70 Amazon reviews

Best for: sustainably sourced — line-caught Alaskan cod with DPA bonus

Line-Caught Alaskan Cod Liver Oil · 1000mg omega-3s per tsp (EPA + DHA + DPA) + Vitamin A + Vitamin D

Liquid · Non-GMO Project Verified

$29.76

$0.74/serving

Buy Nowon Amazon

#5NOW Foods Cod Liver Oil Extra Strength 1000mg 180ct

7.8/10

NOW Foods

6,022 Amazon reviews

Best for: Budget option — lowest cost per serving with GMP quality assurance

Molecularly Distilled Cod Liver Oil · 1000mg CLO per softgel (EPA 70mg + DHA 100mg) + Vitamin A + Vitamin D3

Softgel · GMP Certified, Third-Party Tested

$17.38

$0.10/serving

Buy Nowon Amazon

#6Sports Research Cod Liver Oil 1000mg with Vitamins A & D3

7.8/10

Sports Research

228 Amazon reviews

Best for: Pescatarians wanting a traditional cod liver oil with added Vitamins A and D3 in a burpless, MSC-certified softgel

Wild Alaskan Cod Liver Oil with Vitamins A & D3 · 1000mg cod liver oil (165mg Omega-3, 300mcg Vitamin A, 10mcg D3) per softgel; up to 3 softgels/day

Softgel · IFOS Certified, IGEN Non-GMO Tested, MSC Certified Sustainable

$24.95

$0.21/serving

Buy Nowon Amazon

#	Product	Best For	Ingredient & Dose	Form & Testing	Price	Rating
1	Carlson Cod Liver Oil Liquid Lemon 16.9oz #1 Top Pick 11,899 Amazon reviews	Overall best cod liver oil — highest omega-3 dose with gold-standard purity testing	Norwegian Arctic Cod Liver Oil 1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU	Liquid IFOS Certified, IGEN Non-GMO	$58.63 $0.59/serving	9.6/10	Buy Nowon Amazon
2	Nordic Naturals Arctic CLO Softgels Lemon 180ct 2,802 Amazon reviews	softgel option — convenient format from the gold-standard fish oil brand	Arctic Cod Liver Oil (Triglyceride Form) 750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU	Softgel 60 Servings Third-Party Tested (Certificate of Analysis available)	$42.46 $0.71/serving	9/10	Buy Nowon Amazon
3	Nordic Naturals Arctic CLO Liquid Orange 16oz 2,945 Amazon reviews	Best-tasting liquid cod liver oil — orange flavor appeals to adults and children alike	Arctic Cod Liver Oil (Triglyceride Form) 1060mg omega-3s per tsp + Vitamin A 750-1500 IU + Vitamin D 0-300 IU	Liquid 96 Servings Third-Party Tested (Certificate of Analysis available)	$50.11 $0.52/serving	8.6/10	Buy Nowon Amazon
4	Garden of Life Dr. Formulated Alaskan CLO Liquid 6.76oz 70 Amazon reviews	sustainably sourced — line-caught Alaskan cod with DPA bonus	Line-Caught Alaskan Cod Liver Oil 1000mg omega-3s per tsp (EPA + DHA + DPA) + Vitamin A + Vitamin D	Liquid Non-GMO Project Verified	$29.76 $0.74/serving	8.4/10	Buy Nowon Amazon
5	NOW Foods Cod Liver Oil Extra Strength 1000mg 180ct 6,022 Amazon reviews	Budget option — lowest cost per serving with GMP quality assurance	Molecularly Distilled Cod Liver Oil 1000mg CLO per softgel (EPA 70mg + DHA 100mg) + Vitamin A + Vitamin D3	Softgel 180 Softgels GMP Certified, Third-Party Tested	$17.38 $0.10/serving	7.8/10	Buy Nowon Amazon
6	Sports Research Cod Liver Oil 1000mg with Vitamins A & D3 228 Amazon reviews	Pescatarians wanting a traditional cod liver oil with added Vitamins A and D3 in a burpless, MSC-certified softgel	Wild Alaskan Cod Liver Oil with Vitamins A & D3 1000mg cod liver oil (165mg Omega-3, 300mcg Vitamin A, 10mcg D3) per softgel; up to 3 softgels/day	Softgel 120.00 Count IFOS Certified, IGEN Non-GMO Tested, MSC Certified Sustainable	$24.95 $0.21/serving	7.8/10	Buy Nowon Amazon

Detailed Reviews

#1 Top Pick

Carlson - Cod Liver Oil 1100 mg Omega-3s Plus Vitamins A & D3, Wild Caught Norwegian Arctic, Sustainably Sourced Nordic Fish Oil Liquid, Lemon, 500 mL (16.9 Fl Oz)

Carlson

11,899 Amazon reviews

9.6/10

(11,899)

Gluten-freeNon-GMO (IGEN verified)No artificial preservatives

IngredientNorwegian Arctic Cod Liver Oil

Dose1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IU

FormLiquid

TestingIFOS Certified, IGEN Non-GMO

1100mg omega-3s per tsp (EPA 460mg + DHA 500mg) + Vitamin A 850 IU + Vitamin D3 400 IUClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.59/serving

Ideal for: Overall best cod liver oil — highest omega-3 dose with gold-standard purity testing

Not ideal for: Those who cannot tolerate liquid fish oil or need a travel-friendly format.

Pros

Highest omega-3 content (1100mg EPA+DHA per tsp)
IFOS five-star certified for purity
Pleasant lemon flavor
Norwegian Arctic cod source
Balanced vitamin A and D3 levels

Cons

Liquid requires refrigeration after opening
Less travel-friendly than softgels
Must be used within ~90 days of opening

Buy Nowon Amazon

Read full Norwegian Arctic Cod Liver Oilguide →

Nordic Naturals Arctic Cod Liver Oil, Lemon - 180 Soft Gels - 750 mg Total Omega-3s with EPA & DHA - Heart & Brain Health, Healthy Immunity, Overall Wellness - Non-GMO - 60 Servings

Nordic Naturals

2,802 Amazon reviews

9/10

(2,802)

Gluten-freeNo artificial colors or flavorsNon-GMO

Nordic Naturals is the gold-standard brand in omega-3 supplements, and their Arctic CLO softgels deliver 750mg omega-3s per 3-softgel serving in triglyceride form for superior absorption. Every batch is third-party tested for purity. Lemon-flavored softgels minimize fishy aftertaste.

IngredientArctic Cod Liver Oil (Triglyceride Form)

Dose750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IU

FormSoftgel

TestingThird-Party Tested (Certificate of Analysis available)

750mg omega-3s per 3 softgels + Vitamin A 750-1500 IU + Vitamin D 0-300 IUClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.71/serving$42.46 · 60 Servings

Ideal for: softgel option — convenient format from the gold-standard fish oil brand

Not ideal for: Budget-conscious buyers or those who prefer higher omega-3 doses per serving.

Pros

Gold-standard brand reputation
Triglyceride form for better absorption
No fishy aftertaste (lemon flavor)
Convenient softgel format
Third-party tested every batch

Cons

Requires 3 softgels per serving
Lower omega-3s per serving than liquids
Premium price point

Buy Nowon Amazon

Read full Arctic Cod Liver Oil (Triglyceride Form)guide →

Nordic Naturals Arctic Cod Liver Oil, Orange - 16 oz - 1060 mg Total Omega-3s with EPA & DHA - Heart & Brain Health, Healthy Immunity, Overall Wellness - Non-GMO - 96 Servings

Nordic Naturals

2,945 Amazon reviews

8.6/10

(2,945)

Gluten-freeNon-GMONo artificial colors or preservatives

The orange flavor is a standout for palatability, making this the easiest liquid CLO to take daily. Delivers 1060mg omega-3s per teaspoon in bioavailable triglyceride form. With 96 servings per bottle, the value is strong despite the premium brand price.

IngredientArctic Cod Liver Oil (Triglyceride Form)

Dose1060mg omega-3s per tsp + Vitamin A 750-1500 IU + Vitamin D 0-300 IU

FormLiquid

TestingThird-Party Tested (Certificate of Analysis available)

1060mg omega-3s per tsp + Vitamin A 750-1500 IU + Vitamin D 0-300 IUClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.52/serving$50.11 · 96 Servings

Ideal for: Best-tasting liquid cod liver oil — orange flavor appeals to adults and children alike

Not ideal for: Those who prefer softgels or need the highest omega-3 dose available.

Pros

Excellent orange flavor for palatability
1060mg omega-3s per teaspoon
Triglyceride form for absorption
96 servings per bottle
Third-party tested

Cons

No IFOS certification
Requires refrigeration
Slightly lower omega-3s than Carlson

Buy Nowon Amazon

Read full Arctic Cod Liver Oil (Triglyceride Form)guide →

Garden of Life Dr. Formulated Alaskan Cod Liver Oil 1000 mg Omega 3s (EPA, DHA & DPA) + Vitamins A & D, Non-GMO, Sustainably Sourced & Line Caught, Lemon, 6.76 Fl Oz

Garden of Life

70 Amazon reviews

8.4/10

(70)

Non-GMO Project VerifiedGluten-freeNo artificial flavors

The only cod liver oil on our list from line-caught Alaskan cod, offering full traceability and sustainable sourcing. Uniquely includes DPA (docosapentaenoic acid), an emerging omega-3 with anti-inflammatory and vascular repair properties. Non-GMO Project Verified with a clean ingredient profile.

IngredientLine-Caught Alaskan Cod Liver Oil

Dose1000mg omega-3s per tsp (EPA + DHA + DPA) + Vitamin A + Vitamin D

FormLiquid

TestingNon-GMO Project Verified

1000mg omega-3s per tsp (EPA + DHA + DPA) + Vitamin A + Vitamin DClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.74/serving

Ideal for: sustainably sourced — line-caught Alaskan cod with DPA bonus

Not ideal for: Those seeking the absolute highest omega-3 dose or lowest price per serving.

Pros

Line-caught Alaskan cod (sustainable)
Includes DPA alongside EPA and DHA
Non-GMO Project Verified
Dr. Formulated line (clinical credibility)
Clean ingredient profile

Cons

Smaller bottle (fewer servings)
Higher cost per serving
Newer product with less track record

Buy Nowon Amazon

Read full Line-Caught Alaskan Cod Liver Oilguide →

NOW Foods Supplements, Cod Liver Oil, Extra Strength 1,000 mg with Vitamins A & D-3, EPA, DHA, 180 Softgels

NOW Foods

6,022 Amazon reviews

7.8/10

(6,022)

GMP Quality AssuredMolecularly Distilled

At roughly $0.08 per serving, NOW Foods delivers molecularly distilled cod liver oil with vitamins A and D3 at a fraction of the cost of premium brands. GMP-certified facility and third-party testing provide baseline quality assurance. The 180-count bottle lasts six months.

IngredientMolecularly Distilled Cod Liver Oil

Dose1000mg CLO per softgel (EPA 70mg + DHA 100mg) + Vitamin A + Vitamin D3

FormSoftgel

TestingGMP Certified, Third-Party Tested

1000mg CLO per softgel (EPA 70mg + DHA 100mg) + Vitamin A + Vitamin D3Clinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.10/serving$17.38 · 180 Softgels

Ideal for: Budget option — lowest cost per serving with GMP quality assurance

Not ideal for: Those seeking high EPA+DHA doses per capsule or IFOS-level purity testing.

Pros

Extremely affordable ($0.08/serving)
Molecularly distilled for purity
GMP-certified manufacturing
180-count bottle (6-month supply)
Easy one-softgel serving

Cons

Very low EPA+DHA per softgel (170mg combined)
No IFOS certification
Would need many capsules to match liquid doses

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Sports Research® Omega-3 Wild Alaskan Cod Liver Oil 1000mg with Vitamins A (1000 IU) & D3 (400 IU) - Burpless, Bovine Free, Non-GMO, & MSC Certified Sustainable - 120 Softgels

Sports Research

228 Amazon reviews

7.8/10

(228)

Fish (Cod)

Sports Research's triple certification stack (IFOS + MSC + IGEN) is unusually thorough for a cod liver oil, and the burpless softgel eliminates the classic objection to fish oil supplementation. Ideal for users who want the traditional vitamin A + D3 + omega combo in a clean, sustainable format.

IngredientWild Alaskan Cod Liver Oil with Vitamins A & D3

Dose1000mg cod liver oil (165mg Omega-3, 300mcg Vitamin A, 10mcg D3) per softgel; up to 3 softgels/day

FormSoftgel

TestingIFOS Certified, IGEN Non-GMO Tested, MSC Certified Sustainable

1000mg cod liver oil (165mg Omega-3, 300mcg Vitamin A, 10mcg D3) per softgel; up to 3 softgels/dayClinical range: 1-2 teaspoons (5-10ml) or 1-2 capsules daily

Blend formula

$0.21/serving$24.95 · 120.00 Count

Ideal for: Pescatarians wanting a traditional cod liver oil with added Vitamins A and D3 in a burpless, MSC-certified softgel

Not ideal for: Buyers seeking high-concentration EPA/DHA fish oil — at 165mg Omega-3 per softgel, potency is modest compared to dedicated fish oil products

Pros

Triple certification: IFOS (purity/potency), MSC (sustainable fishing), IGEN Non-GMO tested
A + D3 co-delivery in one softgel — traditional synergistic cod liver oil formula
Burpless and bovine-free — no fish aftertaste and gelatin from non-bovine source
Up to 3 softgels/day allows flexible dosing up to 495mg Omega-3 + 900mcg Vitamin A + 30mcg D3

Cons

Only 165mg Omega-3 per softgel — low vs dedicated fish oil concentrates (1250mg–2500mg products)
Modest review count (228) relative to Sports Research's flagship omega products
Vitamin A at 300mcg/softgel (3 softgels = 900mcg) approaches the tolerable upper limit (3000mcg) if combined with other A-containing products

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Pairs Well With

Frequently taken together based on complementary benefits

Vitamin D3

Sports Research Vitamin D3 + K2 (5000 IU)

Staff Pick

5,000 IU D3 + 100mcg K2

(51,867)$0.07/serving

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Krill Oil

Sports Research Antarctic Krill Oil 1000mg

1000mg krill oil (EPA 136mg + DHA 60mg, astaxanthin ~500mcg)

(11,872)$0.52/serving

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Browse all supplement comparisons →

How to Choose

Liquid vs Softgels

Liquid cod liver oil delivers 5-6x more omega-3s per serving than softgels. One teaspoon of Carlson liquid provides 1100mg omega-3s, while a single NOW Foods softgel provides just 170mg. If your goal is therapeutic omega-3 intake (1000mg+ EPA+DHA daily), liquid is far more practical. Softgels are better for convenience, travel, and those who cannot tolerate the taste of liquid oil.

Vitamin A Safety

Cod liver oil contains preformed vitamin A (retinol), which is well-absorbed but has a tolerable upper intake level of 10,000 IU per day for adults. At 1-2 teaspoons daily, most cod liver oils deliver 850-3000 IU vitamin A — well within safe limits. However, if you also take a multivitamin with vitamin A or eat liver regularly, calculate your total intake. Pregnant women should be especially cautious, as excess preformed vitamin A (above 10,000 IU/day) is associated with birth defects.

Freshness and Oxidation Markers

Oxidized fish oil tastes bad and may reduce health benefits. Look for products that publish their totox (total oxidation) values — IFOS-certified products are required to meet strict oxidation limits. Nitrogen-flushed bottles, dark glass packaging, and antioxidant additions (like vitamin E or rosemary extract) all help preserve freshness. Always refrigerate liquid cod liver oil after opening and use within 90 days.

Cod Source Matters

Wild-caught Arctic cod (from Norway or Alaska) is the standard for quality cod liver oil. Norwegian Arctic cod has a long track record and established supply chains. Alaskan cod offers full traceability with line-caught methods. Avoid products that do not disclose their cod source, as they may use farmed fish or less regulated fisheries. Look for Friend of the Sea or MSC certification as additional sustainability assurance.

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Carlson Cod Liver Oil Liquid Lemon 16.9oz

9.6/10$0.59/servingBest for: Overall best cod liver oil — highest omega-3 dose with gold-standard purity testing

The best cod liver oil supplement delivers 500-1000mg combined EPA+DHA per serving alongside naturally occurring vitamins A and D, with IFOS/IGEN purity certification.

Evidence:Meta-analysis (2018) · high confidence[#2]

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Evidence level, dosage, side effects, and more →

Already taking supplements?

Check how Cod Liver Oil fits with your current stack — interactions, timing, and optimization →

Related Supplements

Omega-3 Fish OilStrong

Bottom line: Omega-3 fish oil is one of the most evidence-backed anti-inflammatory supplements. Take 2-4g EPA+DHA daily for measurable reductions in inflammation and cardiovascular risk.

Vitamin D3Strong

Bottom line: Most adults need vitamin D3 supplements — 42% are deficient. Take 1,000-4,000 IU daily with a fatty meal for immune, bone, and mood support.

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Vitamin AStrong

Bottom line: Vitamin A is crucial for vision, immunity, and skin. Most people get enough from diet — supplement only if deficient, as excess preformed A is toxic.

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Krill OilModerate

Bottom line: Krill oil delivers omega-3s in phospholipid form for superior absorption — supporting heart health, inflammation, and PMS at 1-3g daily.

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Related Conditions

Bone Health Immune Function Heart Health Inflammation Eye Health

Frequently Asked Questions

What is the difference between cod liver oil and regular fish oil?

Cod liver oil comes specifically from the liver of Atlantic or Pacific cod and naturally contains vitamins A and D alongside omega-3 fatty acids. Regular fish oil is extracted from the body tissue of oily fish (sardines, anchovies, mackerel) and contains only omega-3s without significant vitamin A or D. This makes cod liver oil a three-in-one supplement, though it typically provides lower EPA+DHA per serving than concentrated fish oil.

How much cod liver oil should I take per day?

Most adults benefit from 1 teaspoon (5ml) of liquid cod liver oil or 1-3 softgels daily, which provides roughly 800-1100mg omega-3s, 850-1500 IU vitamin A, and 400 IU vitamin D ^[2]. The American Heart Association recommends at least 500mg combined EPA+DHA daily for general heart health. Do not exceed 2 tablespoons of cod liver oil daily to stay within safe vitamin A limits.

Evidence:Meta-analysis (2018) · high confidence[#2]

Can I take cod liver oil if I already take vitamin D?

Yes, but calculate your total vitamin D intake. One teaspoon of cod liver oil typically provides 400 IU vitamin D3. If you also take a standalone vitamin D supplement (commonly 1000-5000 IU), your combined intake should stay below 4000 IU daily for most adults unless directed otherwise by a healthcare provider. The Endocrine Society considers up to 10,000 IU daily safe for short-term use.

Is cod liver oil safe during pregnancy?

Cod liver oil can be beneficial during pregnancy for fetal brain development (DHA) and immune support (vitamin D), but the vitamin A content requires caution. Pregnant women should not exceed 10,000 IU of preformed vitamin A (retinol) daily due to teratogenicity risk. One teaspoon of most cod liver oils provides 850-1500 IU vitamin A, which is safe. Avoid combining with other vitamin A supplements or prenatal vitamins containing retinol without medical guidance.

What does IFOS certification mean for fish oil?

IFOS (International Fish Oil Standards) is the most rigorous third-party testing program for omega-3 supplements. IFOS tests for heavy metals (mercury, lead, arsenic), PCBs, dioxins, and oxidation levels. Products earning five-star IFOS certification meet or exceed all international safety standards. Among our picks, only Carlson holds IFOS certification. Nordic Naturals uses their own third-party testing program with published certificates of analysis.

Does cod liver oil go bad? How should I store it?

Liquid cod liver oil oxidizes over time, especially after opening. Store unopened bottles in a cool, dark place. After opening, refrigerate and use within 90 days. Softgels are more shelf-stable and can be stored at room temperature. Signs of rancidity include a strong fishy smell, bitter taste, or cloudy appearance. Antioxidants like vitamin E in the formula help slow oxidation but do not prevent it indefinitely.

Why is cod liver oil lower in omega-3s than concentrated fish oil?

Cod liver oil is minimally processed to preserve its natural vitamin A and D content, whereas concentrated fish oils undergo molecular distillation or ethyl ester conversion to boost EPA+DHA levels. A teaspoon of cod liver oil provides roughly 1000mg omega-3s, while a concentrated fish oil capsule can provide 1000mg+ in a single softgel. The trade-off is that cod liver oil delivers vitamins alongside omega-3s, making it more of a whole-food supplement.

Can children take cod liver oil?

Yes, cod liver oil has been given to children for generations and is generally considered safe. Dosing depends on age: children aged 1-3 typically take 1/4 teaspoon, ages 4-8 take 1/2 teaspoon, and ages 9-13 take 1 teaspoon. Flavored liquid options (lemon or orange) improve palatability. Adjust vitamin A intake to stay within age-appropriate upper limits (2000 IU for ages 1-3, 3000 IU for ages 4-8). Consult a pediatrician before starting.

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Supplement Guide

Omega-3 Fish Oil

Bottom line: Omega-3 fish oil is one of the most evidence-backed anti-inflammatory supplements. Take 2-4g EPA+DHA daily for measurable reductions in inflammation and cardiovascular risk.

Condition Guide

Bone Health

References

RCTManson JE, Cook NR, Lee IM, et al. (2019). Vitamin D Supplements and Prevention of Cancer and Cardiovascular Disease. New England Journal of Medicine. DOI PubMed
Meta-analysisAung T, Halsey J, Kromhout D, et al. (2018). Associations of Omega-3 Fatty Acid Supplement Use With Cardiovascular Disease Risks. JAMA Cardiology. DOI PubMed
Meta-analysisMartineau AR, Jolliffe DA, Hooper RL, et al. (2017). Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data. BMJ. DOI PubMed
Meta-analysisGoldberg RJ, Katz J (2007). A meta-analysis of the analgesic effects of omega-3 polyunsaturated fatty acid supplementation for inflammatory joint pain. Pain. DOI PubMed
ReviewCalder PC (2017). Omega-3 fatty acids and inflammatory processes: from molecules to man. Biochemical Society Transactions. DOI PubMed
ObservationalAlbert BB, Cameron-Smith D, Robinson PH, et al. (2015). Fish oil supplements in New Zealand are highly oxidised and do not meet label content of n-3 PUFA. Scientific Reports. DOI PubMed
RCTBhatt DL, Steg PG, Miller M, et al. (2019). Cardiovascular Risk Reduction with Icosapent Ethyl for Hypertriglyceridemia. New England Journal of Medicine. DOI PubMed