A recent randomized controlled trial published in American Journal of Clinical Nutrition concluded that vitamin D3 supplementation does not increase weight loss.
In recent years, there has been a lot of discussion on the role of vitamin D in weight. Previous research has found that vitamin D levels tend to be low in overweight and obese people. Researchers have wondered if low vitamin D levels cause obesity or if obesity causes low vitamin D levels. While increasing evidence points to obesity causing low vitamin D levels, a question remains on whether vitamin D supplementation can help in weight loss.