Are Supplements Effective?
Quick Answer
Varies wildly by ingredient. Creatine and Vitamin D have 500+ studies each and clearly work. Testosterone boosters and "detox" supplements have near-zero evidence. In our scoring of 2,499 ingredients, scores range from 1.5/10 (scam) to 9.5/10 (proven). The average supplement scores 6.8/10.
Key Points
- Average supplement ingredient scores 6.8/10 across 2,499 rated
- Top performers (Creatine, Vitamin D) have 500+ studies each
- Bottom performers (detox, testosterone boosters) have near-zero evidence
- Dose and form dramatically affect whether a supplement works
- 62% of products are underdosed, making effective ingredients ineffective
Detailed Answer
EFFECTIVENESS BY CATEGORY (from our database of 2,499 scored ingredients):
HIGHLY EFFECTIVE (Score 8-10, strong evidence):
| Ingredient | Score | Evidence Base |
|---|---|---|
| Creatine Monohydrate | 9.0/10 | 500+ studies, works for 95%+ of users |
| Vitamin D3 | 9.0/10 | Hundreds of trials, addresses common deficiency |
| Omega-3 (EPA/DHA) | 8.5/10 | 300+ meta-analyses for heart, brain, inflammation |
| Magnesium Glycinate | 8.5/10 | Strong evidence for sleep, muscle, mood |
| Caffeine | 8.5/10 | The most studied ergogenic aid |
MODERATELY EFFECTIVE (Score 6-8, decent evidence):
| Ingredient | Score | Notes |
|---|---|---|
| Ashwagandha (KSM-66) | 7.5/10 | Good for stress/cortisol, specific extract matters |
| Probiotics | 7.5/10 | Strain-specific, not all probiotics are equal |
| Collagen | 6.5/10 | Some evidence for skin, less for joints |
| Melatonin | 7.0/10 | Works for sleep onset, not duration |
INEFFECTIVE (Score <5, weak/no evidence):
| Ingredient | Score | Reality |
|---|---|---|
| Testosterone boosters | 3.0/10 | Don't meaningfully raise T |
| "Detox" supplements | 2.0/10 | Your liver already does this |
| Homeopathic remedies | 1.5/10 | Diluted to nothing |
| Most weight loss pills | 3.0-4.0/10 | Minimal effect without diet change |
WHY EFFECTIVENESS VARIES:
1. Dose matters enormously. Underdosed = ineffective. 62% of products we tested were underdosed. 2. Form matters. Magnesium oxide (4% absorption) vs glycinate (80% absorption). 3. Individual variation. Genetics, gut health, existing levels all affect response. 4. Time horizon. Creatine works in a week. Ashwagandha takes 4-8 weeks.
Evidence Quality
Multiple high-quality studies support this
Key Sources:
- reviewARE Supplements Ingredient Database (2,499 ingredients scored)
- reviewARE Supplements Product Analysis (278 products)
- reviewExamine.com Evidence Summaries
Related Questions
Creatine monohydrate. 500+ studies. Works for muscle, brain, recovery. Costs $0.08/day. 95%+ of users respond. And it's not just for gym bros. Emerging evidence for brain health and aging.
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About this information: Our recommendations draw from peer-reviewed clinical trials, systematic reviews, and the same medical databases your doctor uses. These statements have not been evaluated by the FDA. Supplements are not intended to diagnose, treat, cure, or prevent any disease.
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