Observed arrival · 2026-10-16
Kotsu: Aging Claims, Graded by a Bone Surgeon
A Japanese orthopedic surgeon reviews research on strength, mobility, skin, hair, and other aging-related claims.
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◉Human
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- Readers checking aging, mobility, and supplement claims
- Worth noticing
- Articles label claims A–D and link readers to supporting studies; the site says it carries no affiliate links or sponsored content.
Field notes
The homepage organizes coverage into Core (muscle, bone, and joints), Bridge (connective tissue), and Skin & Hair, with examples ranging from biotin and collagen to knuckle cracking and grip strength. Its method defines A as strong, B as moderate, C as early, and D as unsupported, and says supporting studies are one click away from each article. A free weekly newsletter is offered; the site describes its material as general health information, not medical advice.
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