Dandruff, also called seborrheic dermatitis, is an itchy, scaly, oily eruption occurring in the scalp, ears, eyebrows and beard area.

Most patients respond well to increasing doses of oral Vitamin D, which should be monitored with serum vitamin D level.   Patients should start with at least 10,000 IU oral vitamin D per day if their serum level is less than 90.  In a month, the blood level should be rechecked and further increase in Vitamin D intake should be followed until the level reaches 100 or the dermatitis clears.