retinol (redirected from Vitamin A Excess)
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; the form of vitamin A found in mammals, which is reversibly dehydrogenated by enzymatic action into its aldehyde, retinal. See vitamin
A half-carotene; an intermediate in the vision cycle, it also plays a role in growth and differentiation.
retinol /ret·i·nol/ (ret´ĭ-nol) vitamin A1; a 20-carbon primary alcohol in several isomers that is the form of vitamin A found in mammals and that can be converted to the metabolically active forms retinal and retinoic acid.
retinol (rĕt′n-ôl′, -ōl′, -ŏl′)
Etymology: L, rete
one form of vitamin A. It is found in the retinas of mammals. See also vitamin A
An intermediate in the vision cycle, it also plays a role in growth and differentiation; a vitamin A1 alcohol.
retinol The common form of vitamin A found in animal and fish livers and other foods of animal origin. It is easily converted in the body into RETINAL. The drug is on the WHO official list.
Another name for vitamin A.
vitamin A deficiency
A deficiency of vitamin A (also called retinol) leads to interference with growth, atrophy of epithelial tissues resulting in keratomalacia, corneal ulcerations, xerophthalmia with Bitot's spots, reduced resistance to infection of mucous membranes, and abnormal production and regeneration of rhodopsin resulting in night blindness. Management includes a balanced diet and may require large vitamin A supplement with a topical antibiotic to prevent secondary infections. See carotene
; the form of vitamin A found in mammals, which is reversibly dehydrogenated by enzymatic action into its aldehyde, retinal
Patient discussion about retinol
Q. Can a food rich in vitamin B12 will help for his depression or vitamin B12 pills are always required? Hi all…..having one question related to my friends depression and its relation to vitamin B12, as a medicine given to him by his Doctor. Can a food rich in vitamin B12 will help for his depression or vitamin B12 pills are always required?
A. Yes low level of vitamin B12 is associated with depression. You can complete its deficiency by having good diet which will cover the B12 requirements. What happens that depressed people tend to eat less of healthy food and which reduces the B12. So, it again reduces the capacity to fight against the depression.
Q. Can someone give me some information on over intake of Vitamin A and its complications in future? I am having short sightedness. I am wearing specks for the past 3 years. Last week my eye sight had doubled. I never thought to control my eye sight by having a good diet, which is rich in vitamin A. Now I am willing to have vitamin A in tablets and I doubt the adverse effects if taken in excess. Can someone give me some information on over intake of Vitamin A and its complications in future?
A. Having tablets will fortify you with vitamin A but long term intake will lead to show the side effects of over intake. You can have these vitamin tablets as per your doctor’s prescription. But you must have them as a diet intake which will keep your vitamin intake balanced and will not lead to any complications. But the over intake of vitamins can lead to vitamin A toxicity. This can show symptoms as fatigue, muscle pain, depression, Fever and liver anemia.
Q. What is a normal Vitamin D level in an 84 year old woman? How would one correct a level of 50 in a Vitamin D level test?
A. More discussions about retinol