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Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol. This is important for maintaining calcium levels and promoting bone health and development. [4] As a medication, cholecalciferol may be taken as a dietary supplement to prevent or to treat vitamin D ...
Synthesis of vitamin D in nature is dependent on the presence of UV radiation and subsequent activation in the liver and the kidneys. Many animals synthesize vitamin D 3 from 7-dehydrocholesterol, and many fungi synthesize vitamin D 2 from ergosterol. [46] Vitamin D 3 is produced photochemically from 7-dehydrocholesterol in the skin of most ...
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).
Animal-source foods are a diverse group of foods that are rich in bioavailable nutrients including calcium, iron, zinc, vitamins B12, vitamin D, choline, DHA, and EPA. [11] Animal-source and plant-based foods have complimentary nutrient profiles and balanced diets containing both reduce the risk of nutritional deficiencies. [11]
Cholecalciferol (vitamin D 3) is synthesized in the skin after exposure to the sun or consumed from food, usually from animal sources. [46] Ergocalciferol (vitamin D 2) is derived from ergosterol from UV-exposed mushrooms or yeast. [46] When produced industrially as supplements, vitamin D 3 is typically derived from lanolin in sheep wool.
Going on a vegan diet means you'll need to eliminate all animal-derived foods from your kitchen and eat a plant-based diet. That means avoiding meat, seafood, all dairy products, eggs and even honey.
Vegan sources of vitamin D include ergocalciferol and synthetic or plant sources of cholecalciferol. Mushrooms are a good plant source of natural ergocalciferol, especially after being exposed to UV-B light. [52] Cholecalciferol in vegan dog food can be synthetic or naturally derived from lichen, a non-animal source of D3. [55]
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