Nutrex Hawaii Pure Hawaiian Spirulina – Vegan Superfood, 500 mg Tablets, Farm Grown in Kona, Non-GMO, Immune Support & Cellular Energy, 400 Count
$0.47/serving
Price verified Apr 22, 2026
Not evaluated by the FDA · Individual results may vary · Consult a healthcare provider before use
Our verdict
3g per serving (6 tablets) of Hawaiian Spirulina (Arthrospira platensis) per tablet from Nutrex Hawaii. Best for overall / Purity.
Why we recommend this
Grown on the Kona Coast of Hawaii for over 40 years in a biosecure facility using fresh Hawaiian aquifer water and year-round sunshine. Nutrex Hawaii is the gold standard for spirulina purity — their facility produces spirulina with consistently high phycocyanin content and undergoes rigorous heavy metal testing well below FDA limits.
Check for interactions
Already taking other supplements or prescription medications? Add them below to check for documented interactions, severity, and clinical guidance.
Our database currently documents 137+ supplement and drug-category interaction pairs. Combinations not flagged here may still interact — always consult your healthcare provider before combining supplements, especially with prescription medications.
What to watch out for
Requires 6 tablets per serving to reach the 3g clinical dose. Premium pricing at $0.48/serving is significantly more expensive than budget alternatives.
Dose & form
- Serving
- 3g per serving (6 tablets)
- Form
- Tablet
- Clinical range
- 1-3g daily
- Dose adequacy
- Therapeutic
- Supply
- 66 servings · $0.47/serving
Who it's best for
Overall / Purity
Who should skip it
Budget-conscious buyers who want the lowest cost per serving
Pros
- Kona-grown for 40+ years in biosecure facility
- High phycocyanin content from optimal growing conditions
- Rigorous heavy metal testing (arsenic, lead, mercury, cadmium)
- 400-count bottle provides 66 servings
Cons
- Requires 6 tablets per serving
- Premium price at $0.48/serving — 6x the cost of budget options
What customers say
4.6★ across 10,814 Amazon reviews. The most common questions from shoppers: re any potential interactions with medications, re any side effects from long-term use, and cause any digestive issues or side effects. Full answers in the FAQ below.
Frequently Asked Questions
What is the clinical dose for Hawaiian Spirulina (Arthrospira platensis)?
What is the clinical dose for Hawaiian Spirulina (Arthrospira platensis)?
Clinical trials typically use 1-3g daily. Nutrex Hawaii Pure Hawaiian Spirulina 500mg delivers 3g per serving (6 tablets), which we classify as Therapeutic relative to that range.
How does Nutrex Hawaii Pure Hawaiian Spirulina 500mg compare to similar Tablet?
How does Nutrex Hawaii Pure Hawaiian Spirulina 500mg compare to similar Tablet?
See the "Also consider" section below for two alternatives. Choose based on form preference (Tablet vs alternatives), dose adequacy, and third-party testing.
Is Nutrex Hawaii Pure Hawaiian Spirulina 500mg third-party tested?
Is Nutrex Hawaii Pure Hawaiian Spirulina 500mg third-party tested?
Yes — Third-Party Tested. Third-party testing verifies ingredient identity and label accuracy.
Does this work with Amazon Subscribe & Save?
Does this work with Amazon Subscribe & Save?
Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.
Are there any potential interactions with medications?
Are there any potential interactions with medications?
Nutrex Hawaii Pure Hawaiian Spirulina 500mg contains Hawaiian Spirulina (Arthrospira platensis). As with any spirulina supplement, consult your healthcare provider if you take prescription medications, especially blood thinners, blood pressure medications, or immunosuppressants. Nutrex Hawaii recommends consulting a doctor before use if you are on medication.
Are there any side effects from long-term use?
Are there any side effects from long-term use?
At 3g per serving (6 tablets), Nutrex Hawaii Pure Hawaiian Spirulina 500mg provides a clinically effective dose within the studied range of 1-3g daily, up to 8g. 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.
Does it cause any digestive issues or side effects?
Does it cause any digestive issues or side effects?
Spirulina tablets are generally well-tolerated. Nutrex Hawaii Pure Hawaiian Spirulina 500mg is formulated as a tablet which is designed to be gentle on the stomach. Start with a lower dose if you have a sensitive stomach.
Is this product safe for pregnant or nursing women?
Is this product safe for pregnant or nursing women?
Nutrex Hawaii does not specifically market Nutrex Hawaii Pure Hawaiian Spirulina 500mg for pregnant or nursing women. If you are pregnant, nursing, or planning to become pregnant, consult your healthcare provider before taking any spirulina supplement. Clinical safety data during pregnancy is limited for most spirulina products.
Is it safe to take with other supplements?
Is it safe to take with other supplements?
Nutrex Hawaii Pure Hawaiian Spirulina 500mg can generally be combined with other supplements, but be mindful of total spirulina intake from all sources to stay within recommended daily limits (1-3g daily, up to 8g). Nutrex Hawaii's third-party testing (Third-Party Tested) helps ensure purity and accurate labeling.
What is the recommended dosage?
What is the recommended dosage?
The recommended dose is 3g per serving (6 tablets). Clinical studies on spirulina typically use 1-3g daily, up to 8g. Nutrex Hawaii Pure Hawaiian Spirulina 500mg provides a full clinical dose per serving. Follow the label directions or your healthcare provider's recommendation.
Also consider
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