YES. There are enough pieces of evidence to prove the relation between Vitamin D and weight loss. Here is a look at some of them.
1. A 2014 study in the American Journal of Clinical Nutrition found that women who maintained high vitamin-D blood levels and followed a strict diet and exercise routine lost an average of seven pounds more than women who did not have high vitamin-D blood levels.
2. Furthermore, a University of Minnesota study found that since the body uses vitamin D as an environmental sensor, low levels of vitamin D tells the body to store extra energy for times of limited resources.
3. In addition to reducing belly fat, taking vitamin D for weight loss has important implications in musculoskeletal health. A 2017 study found that combining vitamin D with aerobic exercise and resistance training can result in more calorie loss than exercise alone.