Vitamin D is a precursor of several important hormones in the body. The main sources of this nutrient are exposure to sunlight, food and vitamin supplements. This vitamin plays an important role in various bodily functions. It is particularly essential for the absorption of calcium into the bones. Lack of vitamin D can affect various organs like kidneys, liver, bones, and skin. Many people who suffer from acne have noticed a significant reduction in their condition when they started taking vitamin D supplements. Similarly, exposure to sunlight can also boost vitamin D production in the body. However, people with acne must take care not to spend too much time under the sun since this can worsen the condition and make skin red and sore. Suntan and sun blocks can also clog pores and make can worse. Exposure to sunlight for about 30 minutes is sufficient for the body to get the daily recommended dosage of vitamin D. Foods like mackerel, salmon, tuna, beef liver, egg and mushrooms are rich sources of vitamin D. You can also find vitamin D supplements in department stores or pharmacies. The recommended dosage of vitamin D is 800 to 1000 IU per day. If you have acne, you can discuss taking a vitamin D supplement with your dermatologist.