Question: is egg yolk a good source of vitamin d?
Answer: While most of the protein in an egg is found in the white, the fat, vitamins, and minerals are found mostly in the yolk. One typical egg yolk contains 37 IU of vitamin D, or 5% of the DV ( 7 , 24 ). Vitamin D levels in egg yolk depend on sun exposure and the vitamin D content of chicken feed.