Vitamin D is a secosteroid prohormone essential for calcium and phosphorus homeostasis, bone mineralization, and regulation of both innate and…
Vitamin A is a fat-soluble essential nutrient that exists in two principal dietary forms: preformed retinol (retinyl esters) from animal…
Vitamin E comprises a family of eight fat-soluble compounds — four tocopherols and four tocotrienols — of which alpha-tocopherol is…
Vitamin K is a fat-soluble vitamin that exists in two primary natural forms: phylloquinone (K1), synthesized by plants and found…
Vitamin K2 (menaquinone-7, MK-7) is the long-chain form of vitamin K2 with a half-life of ~3 days (vs ~1 hour…
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