Supplements by Health Condition
Evidence-based guides to the most effective supplements for specific health conditions. Each guide ranks supplements by strength of clinical evidence.
We provide evidence-based supplement recommendations for 60 health conditions including anxiety, sleep, stress, joint...
We provide evidence-based supplement recommendations for 60 health conditions including anxiety, sleep, stress, joint pain, brain fog, gut health, and more. Each guide ranks supplements by clinical evidence strength and includes dosage recommendations from peer-reviewed trials.
Anxiety
40 million US adults affected annually (19.1% of population)
The most evidence-backed supplements for anxiety are magnesium (200-400mg glycinate), ashwagandha (300mg KSM-66 twice daily), and L-theanine (200-400mg). All three have multiple randomized controlled trials supporting their use, with ashwagandha showing the strongest effect size.
Sleep
70 million Americans affected by sleep disorders
The top evidence-backed sleep supplements are magnesium glycinate (200-400mg), ashwagandha (300mg Sensoril), and melatonin (0.5-3mg). Magnesium and ashwagandha improve sleep quality without next-day grogginess, while melatonin is best for jet lag or shift work.
Joint Pain
32.5 million US adults affected by osteoarthritis
The top evidence-backed supplements for joint pain are omega-3 fatty acids (2-4g EPA+DHA, shown to reduce NSAID use by 59% in RA patients) and creatine monohydrate (3-5g daily, which supports cartilage metabolism and reduces inflammatory markers). Omega-3s have the strongest evidence for inflammatory joint conditions, while creatine supports joint-supporting muscle strength.
Brain Fog & Focus
Estimated 600 million affected globally; 20-30% of post-COVID patients report persistent brain fog
The best supplements for brain fog and focus are omega-3 fatty acids (1-2g DHA-dominant, linked to 15% faster cognitive processing in RCTs) and creatine monohydrate (5g daily, shown to improve working memory and focus by 20% under cognitive stress). Both support cerebral energy metabolism and have strong safety profiles for long-term use.
Gut Health & Digestion
70 million Americans affected by digestive diseases
The best supplements for gut health and digestion are probiotics (multi-strain formulations with Bifidobacterium and Lactobacillus, shown to improve IBS symptoms in 53 RCTs with NNT of 7), berberine (500-1500mg, which has antimicrobial properties against harmful gut bacteria while supporting beneficial species), and magnesium citrate (200-400mg, which supports regular bowel movements and relieves constipation). For bloating and IBS, probiotics have the strongest evidence; for gut microbiome rebalancing, berberine is the top pick.
Inflammation
Chronic inflammation underlies 7 of the top 10 causes of death in the US
Turmeric (curcumin), omega-3 fatty acids, and beetroot are the three most evidence-backed anti-inflammatory supplements. Curcumin at 500-1,000mg daily (with piperine for absorption) has shown CRP reductions comparable to some NSAIDs in meta-analyses. Omega-3s at 2-3g EPA+DHA lower IL-6 and TNF-alpha, while beetroot reduces inflammation through nitric oxide and betalain pathways.
Immune Function
Immune-related conditions affect millions; 3-5% of adults have autoimmune diseases; average adults get 2-3 colds per year
The best supplements for immune support are zinc (15-30mg daily, which supports immune cell development and reduced cold duration by 33% in a Cochrane meta-analysis), vitamin D (2000-5000 IU daily, which reduced respiratory infections by 42% in deficient individuals), and turkey tail mushroom (1-3g extract, which activates NK cells and T-cells). Zinc is the top pick for acute immune defense, while vitamin D is essential for long-term immune function.
Heart Health
~697,000 US deaths per year from heart disease (CDC, leading cause of death)
CoQ10 (100-300mg/day) lowers blood pressure and improves heart failure outcomes. Omega-3 fatty acids (2-4g EPA/DHA) reduce triglycerides by 20-30%. Magnesium (300-400mg/day) supports healthy blood pressure and heart rhythm. All three have strong evidence from randomized controlled trials.
Energy & Fatigue
45% of Americans report persistent tiredness; fatigue is among the top 10 reasons for primary care visits
The best supplements for energy and fatigue are creatine (5g daily, which directly increases cellular ATP availability), nitric oxide precursors (6-8g L-citrulline, which improves blood flow and oxygen delivery), and beet root (300-500mg dietary nitrate for endurance). For chronic fatigue specifically, correcting common deficiencies — iron, vitamin D, and B12 — often produces the most dramatic improvement.
Weight Loss
42.4% of US adults are obese (CDC NHANES data)
Berberine (500mg 2-3x/day) improves insulin sensitivity and reduces body weight by 2-3kg over 12 weeks. Green tea extract (500-1000mg/day with EGCG) modestly increases fat oxidation. Glucomannan fiber (1g before meals) promotes satiety and reduces caloric intake. All work best alongside diet and exercise.
Acne
Up to 50 million Americans affected annually (85% of people aged 12-24)
Zinc (30-45mg daily) has the strongest evidence for acne, with multiple RCTs showing significant lesion reduction. Probiotics and omega-3 fatty acids also show meaningful anti-inflammatory benefits for acne-prone skin.
Allergies
Over 50 million Americans affected annually (nasal allergies affect 10-30% of adults)
Quercetin (500-1000mg daily) is the most evidence-backed natural antihistamine, stabilizing mast cells and inhibiting histamine release. Vitamin C (1-2g daily) and stinging nettle also show meaningful antihistamine effects in clinical trials.
Back Pain
Up to 80% of adults experience back pain in their lifetime; 20% develop chronic low back pain — The Lancet / Global Burden of Disease
The most evidence-backed supplements for back pain are turmeric/curcumin (1000mg daily, shown to reduce pain scores comparably to NSAIDs), omega-3 fatty acids (2-4g EPA+DHA daily for their anti-inflammatory effects), and magnesium (300-400mg daily, which reduces muscle tension and spasm).
Blood Pressure
116 million US adults (47% of population) have hypertension
The most evidence-backed supplements for blood pressure are beet root (300-500mg dietary nitrate, reduces systolic BP by 3-10 mmHg via nitric oxide), magnesium (300-500mg, particularly effective in deficient individuals), and omega-3 (2-4g EPA+DHA, modest but consistent BP reduction).
Blood Sugar Management
37 million Americans with diabetes; 96 million with prediabetes (38% of US adults)
The most evidence-backed supplement for blood sugar is berberine (1000-1500mg daily, shown to reduce fasting glucose and HbA1c comparably to metformin in some trials). Magnesium (300-400mg) also supports insulin sensitivity, especially in those with deficiency.
Bone Health
10 million Americans have osteoporosis; 44 million have low bone density (NOF)
Calcium (1000-1200mg/day from diet + supplements) combined with vitamin D3 (1000-2000 IU/day) reduces fracture risk by 15-30% in meta-analyses. Vitamin K2 (MK-7, 100-200mcg/day) directs calcium into bones rather than arteries and has been shown to reduce bone loss. All three work synergistically and should ideally be taken together.
Chronic Fatigue Syndrome
The Centers for Disease Control and Prevention (CDC) estimates that between 836,000 and 2.5 million Americans living with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS).
CoQ10 (200-300mg ubiquinol daily) has the strongest evidence for supporting mitochondrial ATP production in chronic fatigue. Rhodiola rosea (370mg/day SHR-5) is supported by a multicenter RCT (n=161) showing a 20% reduction in stress-related fatigue.
Chronic Pain
Approximately 50 million US adults (20.4% of the adult population)
Omega-3 fatty acids (2-4g EPA+DHA daily) and turmeric/curcumin (500-1000mg with piperine) have the strongest evidence for chronic pain management. Palmitoylethanolamide (PEA, 600mg twice daily) is an emerging option with compelling evidence for neuropathic pain.
Cognitive Decline
Dementia is a chief cause of disability globally, with an expected rise in cases in the coming decades due to the aging of the world population.
Evidence for preventing cognitive decline is strongest for daily multivitamin-mineral (MVM) supplementation and omega-3 fatty acids. A 2024 meta-analysis of COSMOS substudies showed MVM benefits on global cognition equivalent to reducing cognitive aging by 2 y, while a 2023 review found that 3.36g of daily EPA and DHA slowed cognitive aging by 2.5 years in cognitively healthy individuals with CAD. B vitamin supplementation (B6, B12, folate) also shows efficacy, with a 2022 meta-analysis reporting a 0.15 MD effect on cognitive decline in non-dementia populations and a 0.20 MD effect in dementia populations.
Cognitive Function
16 million Americans are living with cognitive impairment
Lion's mane (500–1,000 mg daily) may stimulate nerve growth factor production, while DHA omega-3 (1–2 g daily) supports neuronal membrane fluidity. Phosphatidylserine (100 mg three times daily) has moderate evidence for improving memory in older adults.
Dehydration
Up to 75% of Americans may be chronically mildly dehydrated — surveys estimate 43% drink fewer than 4 cups of water daily
The most important supplements for dehydration are electrolyte formulas (containing sodium, potassium, and magnesium in balanced ratios), magnesium (200-400mg daily, as it is the most commonly depleted intracellular electrolyte), and potassium (200-400mg supplemental, alongside dietary sources).
Depression
21 million US adults (8.4% of population) experience at least one major depressive episode per year
Omega-3 fatty acids (1-2g EPA-dominant), saffron extract (30mg daily), and vitamin D (2,000-4,000 IU) have the strongest clinical evidence for supporting mood in mild-to-moderate depression. EPA-dominant omega-3s have the most robust data, with a 2019 meta-analysis showing efficacy comparable to some antidepressants for mild symptoms. Important: supplements should complement — not replace — professional treatment for diagnosed depression.
Eczema (Atopic Dermatitis)
Affects approximately 31.6 million Americans (10.1% of the population)
Probiotics (especially Lactobacillus rhamnosus) and vitamin D (1,000-2,000 IU/day) have the strongest evidence for eczema, with meta-analyses showing reduced SCORAD severity scores. Omega-3 fatty acids and evening primrose oil may provide additional anti-inflammatory support.
Erectile Dysfunction
Approximately 30 million US men affected (52% of men aged 40-70)
L-citrulline (1.5-3g daily) has the strongest supplement evidence for ED, improving erection hardness scores in RCTs by boosting nitric oxide production. Panax ginseng and tongkat ali also show moderate evidence for improving erectile function and libido.
Eye Health
12 million Americans aged 40+ have vision impairment (NEI/CDC)
Lutein (10mg) and zeaxanthin (2mg) daily are the most evidence-backed eye supplements, shown to reduce AMD progression by 18% in the AREDS2 trial. Omega-3 fatty acids (1-2g EPA/DHA) support retinal health and dry eye symptoms. Vitamin A (700-900mcg RAE) is essential for night vision and corneal integrity.
Fertility
Approximately 12-15% of US couples experience infertility (6.1 million women aged 15-44)
CoQ10 (200-600mg daily) improves both egg quality and sperm parameters. Folate (800mcg methylfolate) is essential for preventing neural tube defects and supporting ovulation. Vitamin D and zinc also have strong evidence for both male and female fertility.
Focus & Cognitive Performance
~25% of adults report difficulty concentrating; cognitive complaints have increased 30% since 2020
The most evidence-backed supplements for focus are lion's mane (500-3000mg, stimulates nerve growth factor), mushroom coffee (functional coffee with reduced caffeine + adaptogenic mushrooms), omega-3 DHA (1-2g, supports neuronal membrane integrity), and creatine (5g, enhances cerebral ATP for working memory).
Gastroesophageal Reflux Disease (GERD)
Affects approximately 20% of US adults (roughly 60 million people)
DGL licorice (400mg before meals) and zinc carnosine (75mg twice daily) are the most studied supplements for GERD, helping coat and protect the esophageal and gastric lining while reducing reflux symptoms.
Gout
9.2 million US adults (3.9% of the population) — Arthritis Foundation / NHANES data
The most evidence-backed supplements for gout are tart cherry extract (which lowers uric acid and reduces flare risk by 35-45%), vitamin C (500mg daily shown to reduce uric acid by 0.35 mg/dL), and quercetin (500mg daily inhibits xanthine oxidase activity).
Hair Loss & Thinning Hair
Affects ~80 million Americans; up to 40% of women experience visible thinning by age 40
The most evidence-backed supplements for hair loss are vitamin D (2,000-4,000 IU daily), zinc (15-30mg daily), and omega-3 fatty acids (1-2g EPA+DHA daily). Clinical studies show that correcting deficiencies in these nutrients can reduce hair shedding and improve hair density, particularly in women with telogen effluvium or diffuse thinning.
High Cholesterol
86 million US adults have total cholesterol above 200 mg/dL
Red yeast rice (1,200–2,400 mg daily containing monacolin K) can lower LDL by 15–25%. Omega-3 fatty acids (2–4 g daily) primarily reduce triglycerides by 15–30%. Berberine (500 mg twice daily) has shown LDL reductions of 20–25% in meta-analyses.
Hormonal Imbalance
Approximately 80% of women experience hormonal imbalance at some point
Ashwagandha (300–600 mg KSM-66 daily) has strong evidence for reducing cortisol and supporting thyroid function. Maca root (1.5–3 g daily) may improve hormonal symptoms without directly altering hormone levels. DIM (100–200 mg daily) supports healthy estrogen metabolism.
Hypothyroidism
Approximately 1 in 8 women in the United States are diagnosed with hypothyroidism.
Selenium (200mcg daily) has the strongest evidence for reducing TPO antibodies in Hashimoto's thyroiditis by 20-40% in multiple RCTs. Iodine is required for T3/T4 synthesis, while zinc (15-30mg) supports TSH signaling, though clinical data for zinc in hypothyroidism is less robust than for selenium.
Inflammatory Bowel Disease (IBD)
3.1 million US adults diagnosed with IBD (1.3% of the population) — CDC / NHIS data
The most evidence-backed supplements for IBD are omega-3 fatty acids (2-4g EPA+DHA daily, shown to help maintain remission in ulcerative colitis), probiotics (particularly VSL#3 with 450 billion CFU, effective for UC remission maintenance), and vitamin D (2000-4000 IU daily, which modulates intestinal immune responses).
Irritable Bowel Syndrome (IBS)
25-45 million Americans affected (10-15% of US population)
Peppermint oil (enteric-coated, 200mg three times daily) has the strongest evidence for IBS, with a meta-analysis showing a 57% responder rate. Probiotics and psyllium husk are also well-supported for specific IBS subtypes.
Immune Support
Specific prevalence data for immune dysfunction is not provided in the reviewed literature, though research indicates that certain populations experience inadequate dietary micronutrient intakes that may impair immunity.
Vitamins C and D and zinc have the strongest evidence for immune support, with a 2024 systematic review of 25 trials showing vitamin D supplementation reduces acute respiratory infection risk by 12% overall and by 42% in individuals with baseline 25(OH)D levels below 25 nmol/L. Zinc lozenges or syrup taken within 24 hours of cold onset reduces cold duration by an average of 33% according to a Cochrane review of 18 RCTs.
Insomnia
Approximately 30% of U.S. adults experience insomnia at some point in their lives.
Magnesium glycinate (Strong evidence) and melatonin (Strong evidence) are the most effective supplements for sleep, with meta-analyses showing 17-minute reductions in sleep onset latency. Valerian root (Strong evidence) improves subjective sleep quality by 37% across 16 RCTs. Tart Cherry juice concentrate (Moderate evidence) increases total sleep time by 25 minutes and sleep efficiency by 5-6%, as shown in a crossover RCT with actigraphy measurements.
Low Libido
Affects 15-16% of men and 25-43% of women; prevalence increases with age
Maca root (1,500-3,000mg/day) has the most consistent evidence for improving libido in both men and women, with multiple RCTs showing enhanced sexual desire independent of hormone changes. Tongkat ali and panax ginseng also show meaningful benefits.
Liver Health
~4.5 million US adults diagnosed with liver disease (NCHS); NAFLD affects up to 25% globally
Milk thistle (silymarin 140-420mg/day) is the most studied hepatoprotective supplement, improving liver enzymes and histology in NAFLD. NAC (600-1200mg/day) supports glutathione production and is the medical standard for acetaminophen toxicity. TUDCA (250-500mg/day) is an emerging bile acid supplement that supports bile flow and reduces ER stress.
Longevity & Healthy Aging
Aging affects 100% of the population; age-related diseases account for >60% of global mortality
The top evidence-backed supplements for longevity and healthy aging are NMN (250-500mg, raises NAD+ levels to support DNA repair and mitochondrial function), spermidine (1-6mg, induces autophagy for cellular recycling), berberine (1000-1500mg, activates AMPK for metabolic health), and quercetin (500-1000mg, has senolytic properties that may help clear damaged cells). Each targets a distinct hallmark of aging.
Low Testosterone
Affects an estimated 4-5 million American men; prevalence increases with age (up to 40% in men over 45)
Tongkat ali (200-400mg daily) and ashwagandha (600mg KSM-66) have the strongest clinical evidence for naturally supporting testosterone levels, with RCTs showing 15-24% increases in men with suboptimal baseline levels.
Menopause Support
Approximately 1.3 million women enter menopause each year in the US
Black cohosh (20–40 mg daily) can reduce hot flash frequency by 26% and severity by 36%. Red clover isoflavones (40–80 mg daily) may reduce hot flash frequency by 2–3 per day. Evening primrose oil (500 mg–2 g daily) provides emerging evidence for hot flash relief and improved sleep quality.
Migraines
39 million Americans affected; 3rd most prevalent illness globally
Magnesium (400-600mg daily), CoQ10 (100mg three times daily), and riboflavin/vitamin B2 (400mg daily) are the three most evidence-backed supplements for migraine prevention. Magnesium has the strongest support, with guideline-level recommendations from the American Academy of Neurology. Most people see a reduction in migraine frequency within 3 months of consistent use.
Mood Support
21 million US adults affected by major depressive episodes annually (8.4% of population)
The most evidence-backed supplements for mood support are saffron extract (28-30mg affron, shown to match low-dose SSRIs in multiple RCTs) and ashwagandha (300-600mg KSM-66, which reduces cortisol by 23% and improves mood by reducing the physiological stress response). Both have strong clinical evidence and can be combined for complementary effects.
Muscle Building
45.5 million Americans have a gym membership
Creatine monohydrate (3–5 g daily) is the most well-researched sports supplement, increasing strength by 5–10% and lean mass by 1–2 kg. Whey protein (20–40 g post-exercise) maximally stimulates muscle protein synthesis. HMB (3 g daily) may reduce muscle breakdown during intense training.
Muscle Recovery
DOMS affects virtually all active individuals; 70% of recreational athletes report it limits training frequency
The best supplements for muscle cramps and recovery are magnesium glycinate (200-400mg daily, which prevents cramps by supporting proper muscle contraction and accelerates lactate clearance), creatine monohydrate (5g daily, shown to reduce muscle damage markers by 40% post-exercise), and omega-3 fatty acids (2-3g EPA+DHA, which reduced DOMS severity by 35% in a meta-analysis of 18 RCTs). Magnesium is the top pick specifically for cramps, while creatine leads for overall recovery.
Nausea
Morning sickness affects 70-80% of pregnancies; postoperative nausea affects 30-50% of surgical patients
Ginger (250mg four times daily or 1,000mg total) is the most evidence-backed supplement for nausea, with meta-analyses supporting its use for pregnancy-related nausea, postoperative nausea, and motion sickness. Vitamin B6 (25mg three times daily) is specifically recommended for morning sickness.
Neuropathy
20 million Americans affected by peripheral neuropathy — National Institute of Neurological Disorders and Stroke
The most evidence-backed supplements for neuropathy are alpha-lipoic acid (600mg daily, shown to reduce neuropathic pain scores by 50% in the SYDNEY trial), B-complex vitamins (particularly B12 for deficiency-related neuropathy), and acetyl-L-carnitine (1000mg twice daily, which supports nerve fiber regeneration).
Osteoarthritis
Over 32.5 million US adults affected (roughly 1 in 7 adults)
Glucosamine sulfate (1,500mg/day) and chondroitin (1,200mg/day) are the most studied supplements for osteoarthritis, with the GAIT trial and European guidelines supporting their use for moderate-to-severe knee OA pain.
Polycystic Ovary Syndrome (PCOS)
6-12% of US women of reproductive age (approximately 5 million women)
Myo-inositol (4g daily) has the strongest evidence for PCOS, improving insulin sensitivity, ovulation rates, and hormonal profiles in multiple meta-analyses. Berberine and vitamin D are also well-supported, particularly for metabolic aspects of PCOS.
Premenstrual Syndrome (PMS)
Up to 75% of menstruating women experience PMS symptoms; 20-40% have moderate-to-severe symptoms
Vitex agnus-castus (20-40mg daily) is the most evidence-backed supplement for PMS, with multiple RCTs showing 50-60% symptom improvement. Calcium (1,000-1,200mg/day) and magnesium (200-400mg/day) also have strong supporting evidence.
Prostate Health
Approximately 50% of men over age 50 experience BPH symptoms
Saw palmetto (320 mg daily of liposterolic extract) may reduce BPH symptoms by 20–30% on the IPSS scale. Beta-sitosterol (60–130 mg daily) has shown significant improvements in urinary flow rate. Pygeum africanum (100 mg daily) reduces nocturia and improves quality of life.
Respiratory Health
35+ million Americans have chronic respiratory diseases; respiratory infections are the leading cause of doctor visits — CDC data
The most evidence-backed supplements for respiratory health are NAC (600-1200mg daily, which thins mucus and reduces COPD exacerbations by 25%), vitamin D (2000-4000 IU daily, shown to reduce respiratory infection risk by 12%), and quercetin (500-1000mg daily, which stabilizes mast cells and reduces airway inflammation).
Rheumatoid Arthritis
1.3 million US adults (approximately 0.5-1% of the global population) — American College of Rheumatology
The most studied supplements for rheumatoid arthritis are omega-3 fatty acids (3-4g EPA+DHA daily, shown to reduce morning stiffness and tender joints), turmeric/curcumin (500mg twice daily, comparable to NSAIDs for pain in some trials), and vitamin D (2000-4000 IU daily, as deficiency is common in RA patients).
Skin Health
85 million Americans see a dermatologist annually (AAD)
Collagen peptides (2.5-10g/day) significantly improve skin elasticity and hydration within 8 weeks. Vitamin C (500-1000mg/day) is essential for collagen synthesis and photoprotection. Hyaluronic acid (120-240mg/day) improves skin moisture in clinical trials. All three are supported by randomized controlled studies.
Stress
77% of Americans experience physical symptoms of stress regularly
The most evidence-backed supplements for stress are ashwagandha (300-600mg KSM-66, shown to reduce cortisol by 30% in RCTs), magnesium (200-400mg glycinate, which depletes rapidly under stress), and omega-3 fatty acids (1-2g EPA+DHA, linked to 20% lower stress biomarkers). All three target distinct stress pathways and can be safely combined.
Thyroid Health
20 million Americans affected by thyroid disorders; 4-10% of adults have subclinical thyroid dysfunction
The most important nutrients for thyroid health are iodine (150mcg daily, essential for T3/T4 synthesis), selenium (200mcg daily, needed for T4-to-T3 conversion), and zinc (15-30mg daily, supports TSH signaling). Desiccated thyroid glandulars provide thyroid-specific nutritional support but should not replace prescribed thyroid medication. Always consult an endocrinologist for diagnosed thyroid conditions.
Tinnitus
Approximately 15% of the global population reports experiencing some form of tinnitus.
Evidence for specific supplement interventions for tinnitus is limited, with most high-quality human RCTs focusing on secondary symptoms like sleep or anxiety rather than the auditory perception itself. Zinc supplementation has shown efficacy in specific populations with deficiency, while magnesium and Ginkgo biloba have yielded inconsistent results in small-scale clinical trials.
Urinary Tract Infections (UTIs)
Approximately 150 million cases worldwide annually; 50-60% of women experience at least one UTI
D-mannose (2g daily for prevention) and cranberry extract (36mg proanthocyanidins/day) have the strongest evidence for UTI prevention, with RCTs showing significant reductions in recurrence rates comparable to low-dose antibiotics.
Wound Healing
8.2 million Americans have chronic wounds — Medicare data; acute wound care affects millions more annually
The most evidence-backed supplements for wound healing are vitamin C (250-500mg twice daily, essential for collagen synthesis), zinc (15-30mg daily, shown to accelerate wound closure by 43%), and collagen peptides (10-15g daily, which provide amino acid substrates for tissue repair).