Tag
Vitamin K
Vitamin K from leafy greens tracked 14% less dementia over 28 years; the other form went the wrong way
Vitamin K comes in two forms and the supplement industry prefers K2. Following 54,968 Danes for up to 28 years, higher K1 intake tracked lower dementia risk while higher K2 tracked higher, which is the opposite of the marketing.
Sep 1, 2026
Vitamin K status did not protect bone in a VITAL analysis
Vitamin K is sold as the partner vitamin D needs for bones. In 771 participants of the VITAL trial, higher vitamin K status did not slow two-year bone loss or improve what vitamin D did.
Aug 6, 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