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The Main Physiological Function Of Vitamin A
- Mar 23, 2018 -

Maintain visual

Vitamin A can promote the formation of photosensitive pigments in the visual cells. Total trans-retinol can be catalyzed by retinol isomerase 11-cis-retinol, and then oxidized to 11-cis-retinol, 11-cis-retinol can be combined with the visual protein to become a magenta. Depending on the purple quality of the light after 11-cis-see the yellow aldehyde into total anti-vision of the yellow aldehyde, because the changes in the image, depending on the magenta is a G-protein-coupled receptor, through the signal transduction mechanism, causing the stimulation of the optic nerve, triggering visual. And after the light of the purple-red quality instability, rapid decomposition of the visual protein and total reverse-vision of the yellow aldehyde, and in the role of reducing enzymes to restore total trans-yellow alcohol, restart the whole cycle process. Vitamin A can adjust the ability of the eyes to adapt to the external light, in order to reduce the occurrence of night blindness and vision loss, maintain a normal visual response, contribute to a variety of eye diseases. The effect of vitamin A on vision is the earliest discovered and most understood function.

To promote growth and development

is related to the regulation of the gene by retinol. Retinol also acts as a steroid hormone, which promotes the synthesis of glycoprotein. Promote growth, development, strong bones, and maintain the health of hair, teeth and gums.


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