Protein intake and bone mineral density: Cross-sectional relationship and longitudinal effects in older adults.

3 For example, observational studies in older adults showed a positive trend between higher protein intakes and higher femoral neck and total hip BMD, 3 although at the same time, no associations were observed between protein intake and lumbar spine BMD or total body BMD. 3 One large cohort from 1988 showed positive associations between animal protein intake with BMD at different sites, whereas plant‐based protein was found to be negatively associated with BMD. 5 However, they did not adjust for vitamin D status.

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