Several intervention studies indicate that the combination of vitamin D and calcium leads to successful weight loss. According to a research conducted by the University of Minnesota, volunteers who consumed products rich in calcium and vitamin D lost significantly more weight, and particularly in the abdomen. According to another research conducted at the University of Tenesi, it was found that people who consumed two servings of yoghurt (500g) per day in conjunction with a balanced diet, lost 22% more weight and 81% more abdominal fat than those who skipped the intermediate meals. In addition, there was no decrease in the muscle mass of participants who consumed yoghurt. The leader of the research, Michael Zemel, said that "The calcium and vitamin D found in yoghurt reduce the secretion of the hormone cortisol, which increases the accumulation of abdominal fat."

Despite the fact that the body synthesizes vitamin D when exposed to sunlight, individuals’ levels of vitamin D are low even in Mediterranean countries, particularly in the winter. As a result, it is considered essential to consume products rich in vitamin D, in order to restore its levels in your body.