What role does Vitamin D 25-OH play in weight loss?

Vitamin D 25-OH is a biomarker for vitamin D status. Some observational studies report an inverse association between low vitamin D levels and higher body weight, but causality remains unproven. The provided context does not directly address a role in weight loss. The association may be confounded by lifestyle factors such as physical activity, sun exposure, or diet. Correcting a vitamin D deficiency is important for overall health, but supplementation specifically for weight loss is not supported by strong evidence. Any effect is likely small and not clinically meaningful as a standalone intervention. Caveat: Do not rely on vitamin D as a weight loss tool; focus on diet and exercise.