Are Supplements Good for You? (It Depends on Which Ones)

Vitamin D, omega-3, magnesium, and creatine have the deepest evidence bases, each backed by hundreds to thousands of clinical trials. These aren't theoretical benefits. We're talking measured outcomes in randomized controlled trials.

Vitamin D: 80,000+ studies. Reduces all-cause mortality in deficient populations. 42% of Americans are deficient.

Omega-3: strong evidence for cardiovascular protection, brain health, and inflammation. Most people don't eat enough fish to get adequate EPA/DHA.

Magnesium: 50%+ of adults are low. Connected to sleep, muscle function, blood pressure, and stress response.

Creatine: 500+ studies. Benefits muscle performance AND cognitive function. One of the safest supplements ever studied.

Ashwagandha, l-theanine, probiotics, collagen. These have real evidence but it's less extensive or more condition-specific. They're not useless. They're just not as universally beneficial as the big four above.

The key: match the supplement to your actual need. Ashwagandha is great for stress and cortisol. Useless if stress isn't your problem. L-theanine helps with focus and sleep onset. Not necessary if those aren't issues for you.

Most "detox" supplements. Your liver and kidneys handle detoxification just fine. Biotin for hair (unless you're actually deficient, which is rare). Testosterone boosters for young men with normal testosterone. Anything in a proprietary blend hiding its doses.

We scored 278 products. The average score was 6.2/10. Not dangerous. Just mediocre. The supplement industry's biggest sin isn't harm. It's underwhelming.