vitamin A, antiophthalmic factor, axerophthol, A(noun)
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
Any of several closely related fat-soluble vitamins that are essential for normal vision; retinol.
Vitamin A is a group of nutritionally unsaturated hydrocarbons, which include retinol, retinal, retinoic acid, and several provitamin A carotenoids, among which beta-carotene is the most important. Vitamin A has multiple functions, it is important for growth and development, for the maintenance of the immune system and good vision. Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin the light-absorbing molecule, that is necessary for both low-light and color vision. Vitamin A also functions in a very different role as an irreversibly oxidized form of retinol known as retinoic acid, which is an important hormone-like growth factor for epithelial and other cells. In foods of animal origin, the major form of vitamin A is an ester, primarily retinyl palmitate, which is converted to retinol in the small intestine. The retinol form functions as a storage form of the vitamin, and can be converted to and from its visually active aldehyde form, retinal. The associated acid, a metabolite that can be irreversibly synthesized from vitamin A, has only partial vitamin A activity, and does not function in the retina for the visual cycle. Retinoic acid is used for growth and cellular differentiation.
U.S. National Library of Medicine
Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of CAROTENOIDS found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.
Is a group of nutritional organic compounds found in a variety of food or a man made product containing the same ingredients.
Vitamin A is found in naturally in a wide variety of goods e.g. broccoli, carrots, liver, cheese, butter and tomato etc.
The numerical value of vitamin a in Chaldean Numerology is: 5
The numerical value of vitamin a in Pythagorean Numerology is: 8
Sample Sentences & Example Usage
True vitamin A comes from animal sources and liver is the highest source of it.
Oral vitamin A basically shuts down your sebaceous glands. If you suppress [them] for a long enough period, you can cure someone of their acne, and about 50 percent do hit that cure rate.
Pumpkin seeds are high in vitamin A, vitamin B (including thiamin, riboflavin), vitamin C, vitamin K, niacin, calcium, iron, phosphorus, and protein, they are also high in magnesium, manganese, zinc, potassium, and copper.
Beta-carotene has been proven to improve a person’s skin and decrease wrinkles, it’s also converted to vitamin A in the body. Vitamin A is essential for healthy vision. 1 cup of pumpkin contains 200 percent more vitamin A than the RDI (recommended dietary intake).
In countries where the food system is less sophisticated and we see crushing poverty, the margin between harvest season and hungry season is palpable, these populations can dip into actual deficiency with Vitamin A, especially in respect to young, growing children who can become what we call ‘night blind.'.
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