Goal-Based Guide
For bone health, magnesium and vitamin D have the most support, with collagen behind them. Vitamin K2 is usually paired with D3, though some bone-health coverage leaves it out. Here's what each one does.
Calcium, vitamin D3 and magnesium are often called 'the big three' for bone health. Here are the supplements with the most support for building and keeping strong bones.
Ranked by the verdict on whether each supplement works, worked out from every counted mention. Each dot is one source: a researcher or a study.
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Magnesium supplements are worth taking.
8 sources: 6 positive, 2 partly
Vitamin D supplements are worth taking.
12 sources: 6 positive, 6 partly
Collagen supplements are worth taking.
7 sources: 3 positive, 2 partly, 2 negative
Vitamin K2 is worth taking.
2 sources: 2 positive
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A core bone health stack:
This page shows you which supplements researchers agree on for bone health. A free account opens the dose, form and timing for each supplement, with the interactions to watch. Pro adds chat answers drawn from 3,700+ hours of recorded interviews with 380 researchers and doctors, plus 48,500+ research studies, each one cited.
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