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Vitamin deficiency is the condition of a long-term lack of a vitamin.When caused by not enough vitamin intake it is classified as a primary deficiency, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency.
Vitamin D deficiency or hypovitaminosis D is a vitamin D level that is below normal. It most commonly occurs in people when they have inadequate exposure to sunlight, particularly sunlight with adequate ultraviolet B rays (UVB).
Vitamin B 12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [5] Symptoms can vary from none to severe. [ 1 ]
How vitamin B12 deficiency is detected. If a doctor suspects a vitamin B12 deficiency, they will usually order blood work to check a patient’s levels, Kaiser says. But having lower vitamin B12 ...
"If you don't have a deficiency, choosing to eat a variety of foods can help you meet your vitamin and mineral needs without needing to supplement your diet," Thomason adds. More: Kourtney ...
Vitamin D influences a lot of cellular functions in the body—so it’s possible that mild deficiencies can impact the development of aging-related brain changes, says David Merrill, MD, PhD, a ...