A deficiency of folate can occur when the body's need for folate is increased, when dietary intake or absorption of folate is inadequate, or when the body excretes (or loses) more folate than usual. Medications that interfere with the body's ability to use folate may also increase the need for this vitamin.[5][6][7][8][9][10] Some research indicates that exposure to ultraviolet light, including the use of tanning beds, can lead to a folate deficiency.[11][12] The deficiency is more common in pregnant women, infants, children, and adolescents.