Vitamin D is important for many things to function properly in the body, including the skin. It helps support the immune system and can help with some skin symptoms like acne as well as help treat and/or prevent depression, cancer and other major health concerns.
Anti-Aging: Vitamin D aids in the protection against UV-induced cellular damage, detoxification, and regulation of genes important for cellular aging. Source
Acne: Vitamin D in your system may help address the inflammatory symptoms of acne. Dairy products are a great source of the vitamin, but have been found in some studies to make acne symptoms worse. Taking vitamin D supplements can help treat recurrent acne that appears red and inflamed.
Mood: Vitamin D deficiency can cause depression and mood disturbances.
Immune System: Vitamin D helps to regulate immune responses through T-cells and cathelicidin, a protein that kills infectious organisms, like tuberculosis. Also, epidemiologic evidence has suggested that higher levels of vitamin D may reduce the risk of developing several cancers; most commonly, breast, prostate, and colon.
Weight: In one study, people taking a daily calcium and vitamin D supplement were able to lose more weight than subjects taking a placebo supplement. The scientists said the extra calcium and vitamin D had an appetite-suppressing effect.
Dosage: The recommended IUs for vitamin D are:
children and teens: 600 IU
adults up to age 70: 600 IU
adults over age 70: 800 IU
pregnant or breastfeeding women: 600 IU