Vitamin D deficiency is simply a deficiency in this essential vitamin, resulting in a variety of symptoms that could lead to complications if left untreated. This vitamin is important because it helps regulate the amount of calcium circulating in the blood as well as helps manage the calcium level in the bones.
Vitamin D is produced by the body when our skin gets exposed to sunlight. We can also get it from the food we eat such as dairy products as well as fatty fish. Doctors recommend at least 400 IU to 800 IU of Vitamin D daily.