retinol


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Related to retinol: vitamin A, Retin A

retinol:

see Vitamin A under vitaminvitamin,
group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes.
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Retinol

 

(also called axerophthol or vitamin A), an isoprenoid whose chemical formula is C20H30O. Retinol is soluble in nonpolar organic solvents, insoluble in water, and has a melting point of 63°–64°C. In animals and man, it is converted from the carotene in food and stored mainly in the liver; it is particularly abundant in the liver of whales and fish and in fish oil.

The most important biological function of retinol is its participation in the form of retinal in the visual process. A retinol deficiency results in impairment of twilight vision (night blindness, or nyctalopia) and in injury to epithelial tissue, as in xe-rophthalmia. An excess of retinol causes a variety of metabolic disturbances, an accumulation of retinol in the hydrophobic fraction of cell membranes, and destruction of these membranes. Retinol is commercially synthesized from β-ionone. Retinol is sometimes called vitamin A1; its dehydro derivative C20H28O is called vitamin A2. Retinal1 and retinal2 are distinguished accordingly.

retinol

[′ret·ən‚ȯl]
(biochemistry)
References in periodicals archive ?
Baixas concentracoes de retinol e carotenoides estao inversamente relacionadas com o aumento de chance para a ocorrencia de complicacoes cardiovasculares, independente da presenca de outros fatores de risco (Buijsse e colaboradores, 2005).
Algunas publicaciones asocian concentraciones bajas de retinol y anemia, con la presencia de parasitosis intestinal (9).
Colombia, Malaria, Malnutrition, Paludism, Retinol, Vitamin A.
The Kenyan samples had a mean (SD) serum retinol of 1.
A suplementacao com retinil palmitato foi eficaz na elevacao dos niveis de retinol no colostro, garantindo o fornecimento de quantidade suficiente de vitamina A para satisfazer o dobro das necessidades de retinol do recem-nascido.
The MRDR test can be used as a qualitative indicator of liver stores of VA because the test operates on the fact that as VA liver reserves become low, retinol binding protein accumulates; therefore, after a single oral dose of DRA, the 3,4-didehydroretinol from hydrolysis of DRA binds to accumulated RBP and is rapidly released into the serum after which it can be measured by HPLC.
The new InuMax Advanced Retinol Delivery System is based on newly developed InuMax technology, which is designed specifically to demonstrate excellent ingredient delivery and stability performance where higher-active loads are preferred.
Retinol, put simply, is the base form of vitamin A, a substance that is metabolised into retinoic acid within the skin, and has "tremendous benefits" in terms of skin ageing.
NORMAL SKIN Indeed Labs Retinol Reface Skin Resurfacer, PS19.
Serum retinol and plasma zinc were obtained and analysed in collation with hearing test scores.

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