Cholecalciferol is a non-active hormone made in our skin when it is exposed to ultraviolet B light. It is created using cholesterol. Another name for cholecalciferol is Vitamin D3. It is one of the most powerful forerunner to the active vitamin d called calcitriol. Calcitriol is developed in our liver. Cholecalciferol is transformed right into energetic Vitamin D.

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