Vitamin A is a fat-soluble vitamin essential for various bodily functions. It exists in several forms, including retinol, retinal, and retinoic acid, which are collectively known as retinoids. Additionally, provitamin A carotenoids, such as beta-carotene, can be converted into vitamin A in the body.
Vitamin D3 is a fat-soluble vitamin, known as the "sunshine vitamin". It is the most important form of the vitamin D family. It mainly regulates the calcium and phosphorus metabolism in the body. Vitamin D3 is produced by 7-dehydrocholesterol in the skin. Converted from ultraviolet radiation.
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