Tag

Supplement safety

Page 4 of 4

A patient lying on the table of a CT scanner

Vitamin K2 slowed artery calcium in a two-year trial

A JAMA Cardiology randomized trial gave 180 patients with coronary artery disease vitamin K2 or placebo for two years and found calcium buildup progressed more slowly on the supplement.

Jul 26, 2026

A child holding a nebulizer mask to their face

News

Vitamin A, not D, tracked with better lungs in asthma

A Thorax study of 1,165 children and 1,041 adults with asthma found blood vitamin A levels tracked with better lung function, while vitamin D did nothing measurable in children.

Jul 26, 2026

Softgel and capsule supplements scattered across a marble surface beside small bowls

News

Six in ten US adults take supplements, and the mix changed

A JAMA Network Open analysis of 63,442 adults across 25 years of national survey data found supplement use rose from 51% to 60%, with multivitamins falling and ashwagandha, collagen and elderberry rising.

Jul 25, 2026