subject: Vitamins A Tips And Some Great Sources Of Vitamins A [print this page] Vitamin A is a generic term for a large number of related compounds. Retinol (an alcohol) and retinal (an aldehyde) are often referred to as preformed vitamin A.
Retinal can be converted by the body to retinoic acid, the form of vitamin A known to affect gene transcription.
Retinol, retinal, retinoic acid, and related compounds are known as retinoids.
Beta-carotene and other carotenoids that can be converted by the body into retinol are referred to as provitamin a carotenoids.
Vitamin A is a family of fat-soluble vitamins. Retinol is one of the most usable forms of vitamin A.
Retinol is found in animal foods such as liver and eggs and in some fortified food products such as cold cereal.
Most of you will also know that synthetic drugs and vitamins more often than not have a negative side-effect on the human body that comes with the benefits. Accutane is no different.
Vitamin A is a vitamin that is wanted by the retina of the eye in the form of a specific metabolite, the light-absorbing molecule retinal.
This molecule is absolutely needed for both scotopic and color vision.
In another version (probably as retinol) the vitamin is necessary for the function of the reproductive systems of both male and female mammals
Now, yes, Accutane is a proven action for acne and I dont doubt that it works but the fact that a prescription is needed to purchase it and a liability waver must be signed is proof enough that it is unsafe.
Benefits of Vitamin A
1. Act as anti-oxidant, helping to protect our cells against cancer and other disease
2. Vitamin A improves our dream and prevents night blindness
3. This vitamin promotes formation of strong bones
4. Vitamin A guards us against bacterial, viral, parasitic infections
5. Guards us against heart disease, stroke and lowers blood cholesterol level
6. It can improve skin state like acne or psoriasis
Vitamin A Sources
Vitamin A is found in dark green and yellow vegetables and yellow fruits, such as broccoli spinach, turnip greens, carrots, squash, sweet potatoes, pumpkin, cantaloupe, and apricots, and in animal sources such as liver, milk, butter, cheese, and whole eggs.
Vitamin A Deficiency
Vitamin A deficiency is a lack of vitamin A in humans. It is common in developing countries but rarely seen in urbanized countries. Night blindness is one of the first signs of vitamin A deficiency.
Exophthalmia and total blindness can also occur since Vitamin A has a major role in photo transduction.
Approximately 250,000 to 500,000 malnourished children in the developing world go blind each year from a deficiency of vitamin A, approximately half of which die within a year of becoming blind.
Function of Vitamin A
While vitamin A is best known for its vital role in vision, this vitamin also participates in physiological activities related to the immune system, maintenance of epithelial and mucosal tissues, growth, copy, and bone development.
In food, vitamin A typically occurs as a fat mix called retinyl palmitate.
