Energy balance
Bone Mineral Content (BMC) continues to decline during the weight regain phase (6-12 months) even when total body weight and fat mass are increasing.
If you lose a significant amount of weight (5% or more), your bone density may drop. This drop can continue even if you regain some of the weight later. To protect your bones, consider baseline bone density assessments if you are at risk (e.g., postmenopausal women) and ensure adequate calcium and vitamin D intake alongside resistance training.
All groups, except for women losing 10% or more, significantly regained weight and fat mass at 12 months, while BMC continued to decline.
Why this rating
Based on the same robust DIETFITS secondary analysis with DXA data.
Source
Body composition changes after 6 and 12 months of dietary weight loss: insights from the DIETFITS trial
Sun H. Kim et al. · Journal of the Endocrine Society · 2026
DOI 10.1210/jendso/bvag015
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