Vitamin tests are used to assess the level of certain vitamins in an individual's blood so that doctors can more accurately diagnose vitamin deficiency diseases or vitamin overdoses and devise effective therapy. The vitamins that are most commonly measured by doctors are folate, vitamin B12, vitamin K, vitamin D, and vitamin A.
Not receiving sufficient quantities of a certain vitamin can be devastating, resulting in vitamin deficiency diseases such as scurvy, pellagra, or rickets. Conversely, consuming too much of a certain vitamin can be toxic to a person's system.
Vitamin D
Vitamin D promotes the body's absorption of calcium, which is essential for the normal development and maintenance of healthy teeth and bones. It also helps maintain proper blood levels of calcium and phosphorus.
Recent research has linked vitamin D deficiency to several diverse chronic diseases, including increased risk of:
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Cancer (breast and colon)
Multiple sclerosis
Diabetes
Heart attacks in men
Psoriasis
Bone disease
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