![]() ![]() ![]() ![]() Though it sounds complicated, this process is regulated naturally by the body. Calcitriol binds to vitamin D receptors in nearly every cell throughout the body. After arriving in the liver, vitamin D requires two metabolic conversions to become calcitriol – the active form of vitamin D. Pre-vitamin D3 then converts to vitamin D3 in the skin and transfers to the bloodstream over several days. Vitamin D is naturally produced when UVB light is absorbed by the skin, converting a specialized cholesterol to pre-vitamin D3. Despite being called a vitamin, vitamin D is actually a hormone produced within the body. Vitamin D is often referred to as the sunshine vitamin because vitamin D3 production in the skin is activated by the sun’s ultraviolet B (UVB) rays. ![]()
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