The efficacy and role of vitamin A

The :
Vitamin A to maintain normal visual responses. Maintain the normal epithelial tissue morphology and function. To maintain normal bone development. Have to maintain the function of skin cells, make the skin soft and delicate, with wrinkle wrinkle effect. Lack of vitamin A, make epithelial cells dysfunction, resulting in decreased skin elasticity, dry, rough and dull.

Vitamin A is a complex body of essential nutrients, which in different ways affects almost all body tissues. Although the vitamin is first discovered, but about its physiological function has not been made fully opened. On current knowledge, the vitamin A (including carotene) is the effect and role of the most important include:

The effect of vitamin A:
1, to prevent night blindness and vision loss, to help treat a variety of diseases of the eye (the eye of vitamin A can promote the formation of light-sensitive pigment);
2, the efficacy of anti-respiratory infections;
3, help the immune system function properly;
4, ill a speedy recovery;
5, the surface to maintain the health of tissues or organs;
6, helps eliminate age spots;
7, to promote growth, strong bones, maintaining skin, hair, teeth, gums healthy;
8, external help for acne, pustules, boils, skin ulcers embolism treatment;
9, contribute to emphysema, the treatment of hyperthyroidism.

Vitamin A role:
1, to maintain visual
Vitamin A can promote sensitive visual pigment cell formation. All-trans retinal can be catalyzed retinal isomerase 4 – cis – retinal, 4 – cis – retinal and opsin can be combined into rhodopsin (rhodopsin). Rhodopsin when exposed to light after one of the 4 – cis – retinal into all-trans retinal, because the conformational changes caused by stimulation of the optic nerve, causing vision. The case of rhodopsin after light unstable and rapidly broken down into opsin and all-trans retinal, re-start the whole cycle. Vitamin A can debug the eyes adapt to the intensity of light’s ability to reduce the incidence of night blindness and vision loss, to maintain normal visual responses, contribute to a variety of eye diseases (such as eye dryness and conjunctivitis treatment). The role of vitamin A for vision is first discovered, and it is understood most of the functionality.

2, to promote the growth and development
And retinol on gene regulation. Retinol also has the equivalent of the role of steroid hormones, can promote the synthesis of glycoproteins. Promote growth, development, strong bones, maintaining hair, teeth and gums healthy.

3, to maintain the integrity of epithelial structure and integrity
Retinol and retinoic acid can regulate gene expression, reduced to the scale-like epithelial cell differentiation, increasing the number of epidermal growth factor receptor. Thus, vitamin A can regulate epithelial cell growth, maintenance of normal epithelial tissue morphology and function. To keep the skin moist and prevent drying horny skin and mucous membranes, less susceptible to bacterial damage, help for acne, pustules, boils, skin ulcers embolism treatment; helps eliminate age spots; to maintain healthy tissue or organ surface. Lack of vitamin A, make epithelial cells dysfunction, resulting in decreased skin elasticity, dry, rough and dull.

4, strengthen the immune
Vitamin A helps maintain normal immune system function, can strengthen the infectious diseases, especially respiratory infections and parasitic infections of the body resistance; contribute to emphysema, the treatment of hyperthyroidism.

5, free radical scavenging
Vitamin A also has some antioxidant, can neutralize harmful free radicals.

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Article: The efficacy and role of vitamin A


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