Tag
Supplement safety
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Zinc: uses, evidence, dosing and safety
Zinc has three evidence-backed uses: a lozenge for an adult's cold, a high-dose formula for existing macular degeneration, and children in places where deficiency is common. The daily immune capsule is not one of them.
Aug 3, 2026
A vitamin B3 supplement tracked far less glaucoma in at-risk eyes
Among 2,920 matched patients with high eye pressure, those taking nicotinamide developed glaucoma at 3.5% against 9.0%. The design cannot prove the supplement caused it.
Aug 2, 2026
Newborns who skipped vitamin K had triple the brain bleeds
A JAMA Pediatrics study of 2 million Swedish births found infants who did not get the vitamin K injection had higher odds of bleeding, and refusals have more than doubled since 2006.
Jul 28, 2026
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