Bone health evidence brief
Vitamin K2 has plausible bone and calcification roles, but supplementation claims are strongest in deficiency-risk or osteoporosis contexts, not general longevity use.
RCT meta-analyses report bone-marker and some fracture signals, while cardiovascular calcification trials remain inconsistent.
Studies use different menaquinone forms and doses; food intake, vitamin D, calcium, anticoagulant use, and baseline risk all change the interpretation.
People using warfarin or other vitamin K-sensitive anticoagulants should not change vitamin K intake without clinical supervision.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
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