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Dr. Tolliver adds that people with darker skin need three times as much vitamin D as those with lighter skin because they synthesize the nutrient at a lower amount. Related: 13 Foods High In Vitamin D
Sunbaker, by Max Dupain. Exposure of skin to ultraviolet radiation from sunlight presents both positive and negative health effects. On the positive side, UV exposure enables the synthesis of vitamin D 3, which is essential for bone health [1] and potentially plays a role in inhibiting certain cancers.
Vitamin D is produced in the keratinocytes of two innermost strata of the epidermis, the stratum basale and stratum spinosum, which also are able to produce calcitriol and express the vitamin D receptor. [166] Vitamin D 3 is produced photochemically from 7-dehydrocholesterol in the skin of most vertebrate animals, including humans. [167]
Previtamin D 3 is an intermediate in the production of cholecalciferol (vitamin D 3). It is formed by the action of UV light, most specifically UVB light of wavelengths between 295 and 300 nm, acting on 7-dehydrocholesterol in the epidermal layers of the skin. [1] [2] [3] The B ring of the steroid nucleus structure is broken open, making a ...
There are two sources of vitamin D: Vitamin D2 comes from fortified foods and mushrooms, while vitamin D3 is produced in the skin when exposed to sunlight (which is why it’s often known as the ...
Even high-SPF sunscreens allow a small amount of UVB to reach the skin, sufficient for vitamin D synthesis. Additionally, brief, unprotected sun exposure can produce ample vitamin D, but this exposure also risks significant DNA damage and skin cancer. To avoid these risks, vitamin D can be obtained safely through diet and supplements.
The epidermal strata of the skin. 7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D 3 in the skin, therefore functioning as provitamin-D 3. The presence of this compound in human skin enables humans to manufacture vitamin D 3 (cholecalciferol).
Vitamin C aids in the collagen synthesis process, keeping skin firm and plump. Zinc is helpful for making keratin, the protein found in hair and nails. Copper helps the body process iron, a ...
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