# Low Vitamin D Linked to Muscle Loss, Especially in People With Diabetes

*Vitamin D status and sarcopenia in older adults: population-based evidence for synergy with diabetes and experimental validation in an aged diabetic rat model.*

- **Evidence Level**: Moderate
- **Publication Types**: Journal Article
- **Journal**: The journal of nutrition, health & aging
- **Sample Size**: 7,520 older adults plus aged diabetic rats
- **Authors**: Zhang C, Li M, Li C, Xue L, Lv C, Guo Q, Zhao Y, Zhao H
- **Published**: 2026-06-02
- **Topics**: vitamin D, sarcopenia, diabetes
- **DOI**: https://doi.org/10.1016/j.jnha.2026.100886
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42229217/

## Summary

In a study of over 7,500 older adults, low vitamin D was tied to higher odds of sarcopenia (age-related muscle loss). The link was stronger in those with diabetes. In aged diabetic rats, vitamin D3 supplements improved muscle strength and reduced fat buildup inside muscle fibers.

## Practical Takeaway

This study suggests checking vitamin D status may matter more for older adults with diabetes.

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