Initial Posting: 7/15/2015    Last Update: 8/3/2017
Question: I've heard that taking vitamin D can reduce your natural production of melatonin and interfere with sleep. Is this true?
Answer: It is true that preliminary research suggests that a high dose of vitamin D can reduce the amount of melatonin naturally produced in the body. You can find details in the "Concerns and Cautions" section of the Vitamin D Supplements Review >>