After discussing the effects of sunlight on SD as well as a “cheat” of bringing the sunlight into our homes during the winter, let us focus today on the related topic of vitamin D deficiency and supplementation. Time and again, vitamin D deficiency is brought up both in the scientific community (paper1, paper2) and anecdotal accounts by those with SD. Let us bring forward some of those accounts: I myself have been diagnosed with Vitamin D deficiency so like others with Seb Derm, I’m “proof” that Vitamin D deficiency and Seb Derm go hand in hand and I was still deficient despite taking supplements for around 2 months. Also, I…