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Excessive consumption of vitamins. Hypervitaminosis is a condition of abnormally high storage levels of vitamins, which can lead to various symptoms as over excitement, irritability, or even toxicity. Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A, for example, is called ...
Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of vitamin A deficiency is night blindness. [6] Vitamin A in the form of retinoic acid is essential to normal epithelial cell ...
Xerophthalmia. In xerophthalmia, Bitot's spots occur after conjunctival xerosis. Xerophthalmia (from Ancient Greek xērós ( ξηρός) meaning "dry" and ophthalmos ( οφθαλμός) meaning "eye") is a medical condition in which the eye fails to produce tears. It may be caused by vitamin A deficiency, [ 1] which is sometimes used to ...
Retinyl palmitate is used as a source of vitamin A added to low fat milk and other dairy products to replace the vitamin content lost through the removal of milk fat. Palmitate is attached to the alcohol form of vitamin A, retinol, in order to make vitamin A stable in milk. [citation needed] Retinyl palmitate is also a constituent of some ...
Bitot's spots. Bitot's spots are the buildup of keratin located superficially in the conjunctiva of human's eyes. They can be oval, triangular or irregular in shape. The spots are a sign of vitamin A deficiency and associated with drying of the cornea. In 1863, the French physician Pierre Bitot (1822–1888) first described these spots. [ 1]
Megavitamin-B6 syndrome, also known as hypervitaminosis B6, vitamin B6 toxicity, and vitamin B6 excess, [ a] is a medical condition characterized by adverse effects resulting from excessive intake of vitamin B 6. [ 1][ 2][ 22] Primarily affecting the nervous system, this syndrome manifests through symptoms such as peripheral sensory neuropathy ...
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