Vitamin D is produced by the body when exposed to sunlight. The average person requires anywhere from 10-30minutes of sun at least 3-4 times per week in order to produce enough Vitamin D.
1.Cognitive Function-Some studies show that low levels of vitamin D are connected to low mood, dementia, lower congnitive functions. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2730978/
2.Weight loss- Studies have shown that Vitamin D with Calcium has helped reduce heard diseases risk markers and, in some users, it has helped lose weight when taken alongside proper eating habits.
3.Reduce Cancer Risk- In studies of cancer in mice, Vitamin D showed it could slow or prevent cancer in the subjects by promoting cellular differentiation, reduce tumor blood vessel formation, decrease cancel cell growth and stimulate cancerl cell death. https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/vitamin-d-fact-sheet#r7