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Vitamin D and Melatonin Production

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 >>

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Comments
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Margaret13982   May 3, 2017
Since Vitamin D can affect your melatonin, would it be better to take the vitamin D in the morning time?

ConsumerLab.com   May 4, 2017
As vitamin D is fat-soluble and stays for a while in your body, it shouldn't matter. However, it's best to take vitamin D with food containing oils, to enhance absorption. Also, the concern with interaction with melatonin relates only to high-dose vitamin D, as discussed in the Review.

george8442   February 15, 2016
Are there supplements to reduce prostate size? Thank you.

ConsumerLab.com   February 18, 2016
Hi George - We've now answered your question here: https://www.consumerlab.com/answers/_/prostate_supplements/

This CL Answer initially posted on 7/15/2015. Last updated 8/3/2017.

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