Bones aren’t built by pills alone, major study finds

A BMJ meta-analysis of 69 trials with over 153,000 adults shows that vitamin D, calcium, or both together offer little to no meaningful reduction in fractures or falls for most healthy adults. The findings don’t deem supplements useless but highlight that bone health depends on lifestyle factors—exercise, diet, sunlight, and overall habits—rather than pills alone. Supplements may still be warranted for those with true deficiencies, osteoporosis, malabsorption, limited sun exposure, or specific medical conditions, under a doctor’s guidance. Practical steps to support bones include regular weight-bearing and strength training, calcium- and protein-rich foods, morning sunlight, avoiding smoking and excess alcohol, maintaining a healthy weight, and falls prevention.