Calcium and vitamin D supplements show little benefit for bone health in major review

September 20, 2026 at 05:00 AM1 min

This digest was compiled by AI from multiple sources — links to the originals are below.

A review of 69 randomized trials involving 153,902 adults found calcium and vitamin D supplements provide little to no meaningful protection against fractures or falls. The findings, published in The BMJ, challenge widespread recommendations for older adults to take these supplements for bone health.

Key Facts

The review analyzed 69 randomized controlled trials with 153,902 adult participants.
High certainty evidence from 36 trials with 92,045 participants showed vitamin D supplements alone had little to no effect on fracture risk.
High certainty evidence from 15 trials with 51,126 participants showed combined calcium and vitamin D supplements had little to no effect on fracture risk.
Moderate certainty evidence from 11 trials with 9,067 participants showed calcium supplements alone had little to no effect on fracture risk.
Nearly one in three adults aged 65 and older falls each year, leading to fractures, chronic pain, and loss of independence.

Review Methodology

Researchers in Canada examined 69 randomized controlled trials involving 153,902 adults. The trials compared calcium supplements, vitamin D supplements, or their combination with placebo or no treatment. The team assessed risk of bias and certainty of evidence using established research methods.

Fracture and Fall Outcomes

After setting thresholds for clinically meaningful benefit, researchers found little to no effect on the chance of any fracture. For calcium supplements, the conclusion was based on moderate certainty evidence from 11 trials with 9,067 participants. For vitamin D supplements, high certainty evidence from 36 trials with 92,045 participants showed little to no meaningful effect. For combined calcium and vitamin D, high certainty evidence from 15 trials with 51,126 participants also showed little to no meaningful effect. The same pattern appeared for hip fractures and falls.