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For those that don’t know, Vitamin d is created when sunlight hits skin. “The major natural source of the vitamin is synthesis of cholecalciferol in the lower

For those that don’t know, Vitamin d is created when sunlight hits skin. “The major natural source of the vitamin is synthesis of cholecalciferol in the lower layers of skin epidermis through a chemical reaction that is dependent on sun exposure (specifically UVB radiation)” https://en.m.wikipedia.org/wiki/Vitamin_D https://en.m.wikipedia.org/wiki/Vitamin_D Which unfortunately doesn’t work well in the winter depending on how far you are from the equator. It’s fat soluble so levels can be tested.

watertom 6y ago
>For those that don’t know, Vitamin d is created when sunlight hits skin. Actually it's when UVB rays hit the skin, and only during certain times of the day, and north of 37 degrees only during part of the year. In order to get enough UVB rays to make Vitamin D you need sunlight from around noon, during spring summer and fall https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257661/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257661/