Best supplements by goal

An evidence-ranked guide to supplements for muscle and strength: what actually works, what works only in specific cases, and what to skip.

What actually helps you fall asleep and stay asleep, ranked by strength of evidence — plus the popular sleep supplements that do not hold…

Which anxiety and stress supplements actually have trials behind them, ranked by strength of evidence — plus the popular ones worth…

Immune supplements ranked by strength of evidence: what actually shortens a cold, what only helps if you are deficient, and what to leave…

What actually helps focus and memory, ranked by strength of evidence: caffeine, citicoline and bacopa lead, and the popular brain pills…

What actually helps with low energy and fatigue, ranked by strength of evidence, plus the popular energy supplements that do not hold up.

What actually helps joint pain, ranked by strength of evidence: curcumin, boswellia and ASU lead, while glucosamine and most joint blends…

What actually works for skin, hair and nails, ranked by strength of evidence: collagen peptides give modest gains, biotin and silica do not.

The supplements with real evidence for cholesterol and heart health, ranked by strength of evidence — plus the popular ones that do not…

An evidence-ranked guide to gut and digestion supplements: what actually helps constipation, IBS, gas, nausea and antibiotic-related…