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Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [1] It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [ 1 ]
This category reflects the organization of International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Generally, diseases outlined within the ICD-10 codes E50-E56 within Chapter IV: Endocrine, nutritional and metabolic diseases should be included in this category.
Vitamin A deficiency has been linked to compromised resistance to infectious diseases. [33] [34] In countries where early childhood vitamin A deficiency is common, vitamin A supplementation public health programs initiated in the 1980s were shown to reduce the incidence of diarrhea and measles, and all-cause mortality.
There were 735.1 million malnourished people in the world in 2022, a decrease of 58.3 million since 2005, [2] despite the fact that the world already produces enough food to feed everyone (8 billion people) and could feed more than that (12 billion people).
Vitamin poisoning is the condition of overly high storage levels of vitamins, which can lead to toxic symptoms. The medical names of the different conditions are derived from the vitamin involved: an excess of vitamin A, for example, is called "hypervitaminosis A". Iron overload disorders are diseases caused by the overaccumulation of iron in ...
Vitamin A embryopathy; Vitamin B 6 deficiency; Vitamin B 12 deficiency; Vitamin B 12 responsive methylmalonic acidemia, cbl A; Vitamin B 12 responsive methylmalonicaciduria; Vitamin D resistant rickets; Vitamin E deficiency; Vitamin E familial isolated, deficiency of; Vitiligo mental retardation facial dysmorphism uremia
Vitamin B12 deficiency symptoms . Vitamin B12 deficiency has a few hallmark symptoms, according to doctors: Lack of energy. Mental fatigue. Nausea, vomiting, or diarrhea. Lack of appetite. Weight loss
Keratomalacia is an eye disorder that results from vitamin A deficiency. Vitamin A is required to maintain specialized epithelia (such as in the cornea and conjunctiva ). The precise mechanism is still not known, but vitamin A is necessary for the maintenance of the specialized epithelial surfaces of the body.