Study Highlights Vitamin D3’s Benefits Over D2
Key Findings:
- Optimal for Muscle and Heart Health: Research from the ICMR-National Institute of Nutrition (ICMR-NIN) in Hyderabad indicates that Vitamin D3 is more effective than Vitamin D2 in supporting skeletal muscle and heart functions in male rats.
- Research Details: The study, titled “Dietary Vitamin D2 Is Less Potent Than Vitamin D3 at Maintaining or Restoring Structure and Metabolism of Skeletal Muscle and Heart in Male Rats,” was published in Molecular Nutrition & Food Research.
Methodology:
- Experimental Design: Researchers compared the effects of both vitamin forms on male Sprague-Dawley rats through various diets: one with Vitamin D2, one with D3, a combination of both, or a vitamin D-deficient diet.
- Parameters Assessed: Key metrics included body composition, muscle strength, skeletal muscle structure, metabolic markers, and cardiac function.
Results:
- Muscle Health: Vitamin D3 led to greater improvements in:
- Muscle mass
- Muscle fiber size
- Grip strength
- Cardiac Function: Enhanced effects on markers of cardiac contractility and metabolism were noted with Vitamin D3 compared to D2.
Key Statements:
- Dr. Ayesha Ismail, a main author of the research, emphasized that while both vitamins improved calcium-related factors, D3 surpassed D2 in muscle and heart health.
- Dr. Bharati Kulkarni, Director at ICMR-NIN, noted the necessity for further studies to understand vitamin D’s implications on human health.
Conclusion:
These findings highlight the distinct benefits of Vitamin D3, suggesting a preference for its use in dietary supplements and food fortification, with a call for deeper investigations into impacts beyond just bone health.
Publication Date: September 2, 2026
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