Vitamin D is a fat-soluble essential nutrient produced in the skin when exposed to ultraviolet sunlight and also obtained from certain foods and supplements. It plays a vital role in regulating blood calcium and phosphorus levels, promoting healthy bones and teeth. Vitamin D also supports immune function, helps prevent osteoporosis, and some studies suggest it may contribute to heart and muscle health and protection against certain chronic diseases.
It is a test that measures the level of vitamin D in the blood to assess the adequacy of this vitamin, which is essential for calcium and phosphorus absorption and for maintaining healthy bones and teeth.
Sample Type
Blood
Preparation
TAT
4 hours
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