Vitamin D Supplementation Does Not Affect Metabolic Changes Seen With ART Initiation.

Area of Science:

• Endocrinology
• Infectious Diseases
• Nutritional Science

Background:

• Antiretroviral therapy (ART) initiation is associated with insulin resistance and dyslipidemia.
• Observational studies suggest vitamin D may mitigate these metabolic changes.
• The efficacy of vitamin D supplementation in this context requires rigorous investigation.

Purpose of the Study:

• To evaluate the effect of high-dose vitamin D3 and calcium supplementation on metabolic changes in HIV-infected individuals starting ART.
• To assess impacts on insulin resistance, lipid profiles, and metabolic syndrome components.

Main Methods:

• A 48-week prospective, randomized, double-blind, placebo-controlled trial.
• Participants received high-dose vitamin D3 (4000 IU daily) plus calcium (1000 mg daily) or placebo.
• Insulin resistance, fasting lipids, and metabolic syndrome were measured at baseline, 24, and 48 weeks.

Main Results:

• No significant differences in insulin resistance or lipid profiles between vitamin D/calcium and placebo groups over 48 weeks.
• Slight increases in insulin resistance were observed in the placebo arm at 24 weeks.
• Low-density lipoprotein cholesterol increased in the placebo arm at 24 weeks, but not in the vitamin D/calcium arm.

Conclusions:

• Vitamin D and calcium supplementation did not alter lipid profiles or glucose metabolism during ART initiation.
• Vitamin D supplementation is unlikely to be effective in preventing metabolic complications associated with ART.
• Further research may be needed to explore alternative strategies for managing metabolic health in HIV patients on ART.