Example D3 + K2 Softgels
4.0/5A sample verdict for a D3 + K2 combination. Mention the dose, who it suits and the warfarin caution.
One a dayContains oil for absorption
Best Supplements for Bone Health: Calcium, Vitamin D and Beyond
Calcium and vitamin D together modestly reduce fractures in older adults at risk. K2, magnesium and collagen are weaker. See doses and food-first tips.
By the editorial team · Updated Oct 14, 2026 · 2 sources cited
The short answer
The best supplements for bone health are calcium and vitamin D, especially for older adults who don't get enough from food. Together they may modestly reduce fracture risk in those at risk. Vitamin K2, magnesium and collagen have weaker evidence. Weight-bearing exercise and osteoporosis medicines, when needed, have bigger effects.
Evidence-ranked options
| Supplement | Evidence | Typical dose | Notes |
|---|---|---|---|
| Vitamin D | B | 600–800 IU a day; more if deficient | Needed to absorb calcium. |
| Calcium (to fill a dietary gap) | B | Total 1,000–1,200 mg from food + supplements | Take ≤500 mg at a time; food first. |
| Vitamin K2 | C | 90–200 mcg a day | Mixed results for bone density. |
| Magnesium | C | Meet the RDA | Part of bone structure; little direct fracture evidence. |
A: strong · B: moderate · C: limited or mixed · D: good evidence of no benefit. See the evidence database.
Build and keep strong bones
- Weight-bearing and resistance exercise
- Enough protein
- Avoid smoking and limit alcohol
- Ask about a bone density scan if you're a woman over 65 or have risk factors
See also best time to take vitamin D.
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Frequently asked questions
Can you take too much calcium?
Yes. The upper limit is 2,000–2,500 mg a day. High-dose supplements may raise kidney stone risk.
Do bone supplements reverse osteoporosis?
No. They support treatment, but osteoporosis often needs prescription medicine.
Sources
Educational content, not medical advice. Read our medical disclaimer.