Bone Health in Obesity and Weight Management

Bone health in the context of obesity and weight management represents a complex interplay between mechanical loading, endocrine regulation and metabolic adaptation. Excess adiposity exerts both protective effects on bone mass through increased skeletal loading and deleterious effects via chronic inflammation, adipokine imbalances and marrow fat infiltration. Intentional weight loss improves cardiometabolic profiles but is often accompanied by reductions in bone mineral density and alterations in bone microarchitecture, elevating fracture risk. Emerging evidence emphasises that the quality of bone strength depends not only on quantity of bone but also on its structural integrity, as influenced by hormonal changes (for example, leptin, adiponectin), nutrient availability and energy balance. Exercise modalities—particularly resistance training—can attenuate weight-loss-associated bone loss by preserving lean mass and stimulating osteogenic pathways. Nutritional strategies, including adequate protein, calcium and vitamin D intake, as well as targeted metabolite supplementation, hold promise for maintaining or improving bone turnover during energy restriction. Given increasing global obesity prevalence and widespread adoption of dieting practices, understanding how to safeguard skeletal health during weight management carries significant public health and clinical implications.

Research from Nature Portfolio

A comprehensive meta-analysis of prospective studies has characterised the relationship between weight change and hip fracture risk. Results indicate that unintentional or intentional weight loss is associated with nearly a twofold increase in hip fracture risk, whereas weight gain confers a protective effect. Dose–response modelling reveals a monotonic increase in fracture risk with greater weight loss and a reciprocal decline with weight gain. These findings underscore the importance of monitoring bone health in individuals undergoing weight reduction and suggest that maintaining or modestly increasing body weight may mitigate fracture risk in vulnerable populations.

Bone Health in Obesity and Weight Management publication trend

The graph below shows the total number of articles in bone health in obesity and weight management across all publications each year (not limited to Nature Index journals).

Technical terms

Bone Mineral Density (BMD): Mass of mineral per unit area of bone, measured by dual-energy X-ray absorptiometry.

Bone Turnover: The dynamic process of bone formation by osteoblasts and resorption by osteoclasts.

Microarchitecture: Three-dimensional structural characteristics of bone, including trabecular thickness and connectivity.

One-Carbon Metabolism: A network of biochemical reactions involving folate and methionine cycles that regulates methylation and nucleotide synthesis.

P1NP (Procollagen Type 1 N-Terminal Propeptide): A marker of new collagen synthesis and bone formation.

CTX (C-Terminal Telopeptide of Type I Collagen): A biomarker of collagen degradation and bone resorption.

References

1. Methionine and one carbon metabolism as a regulator of bone remodeling with fasting. JCI Insight (2024).
2. The relationship between weight change and risk of hip fracture: meta-analysis of prospective studies. Scientific Reports (2015).
3. The long-term effect of intentional weight loss on changes in bone mineral density in persons with type 2 diabetes: results from the Look AHEAD randomized trial. Archives of Osteoporosis (2023).
4. Weight Loss Interventions and Skeletal Health in Persons with Diabetes. Current Osteoporosis Reports (2022).