About 60% of the brain is fat, and DHA is the dominant omega-3 fatty acid in that fat. Here's what the latest clinical evidence says about omega-3 supplementation and brain health across different populations.

Collagen is the most abundant protein in the body, but how well does supplementing it actually work? A 2026 umbrella review of 113 clinical trials is the most comprehensive look at the evidence yet.

Berberine has been used in traditional medicine for centuries, but the modern clinical evidence is what's interesting. A 2024 meta-analysis pooling 50 RCTs and 4,150 participants is the strongest look yet at what it actually does to blood sugar and lipids.

Zinc is one of the most studied minerals in immune research. Here's what the clinical evidence actually says about how it works, who's most likely to be deficient, and what supplementation does and doesn't do.