Only when dairy and greens are consistently low. Food sources beat supplements here.
TrustedSupp Tier System™ · Tier 2Take until levels correct
Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
Evidence strength
74/100Strong
WEAKLIMITEDMODERATESTRONGVERY STRONG
What the evidence supports: bone health when dietary intake is genuinely low.
This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.
How long to take it
Temporary for most, ongoing after menopause or with osteoporosis treatment.
Who it's actually for
People with genuinely low dairy and leafy green intake, and post-menopausal women.
Safe upper limit
Verified
2,500 mg per day (2,000 mg over age 50)
Excess raises kidney stone risk and, in some studies, arterial calcification. Supplemental calcium behaves differently from dietary calcium.