Vitamin A 90 capsules YAMAMOTO

Vitamin A 1200mcg - Dietary supplement providing 1200mcg of vitamin A, recommended for those with reduced dietary intake or increased needs. Vitamin A contributes to the normal function of the immune system and the maintenance of normal skin and vision. Science understands the role of vitamin A, especially in relation to its effects on the visual system. The human retina contains four types of photopigments containing vitamin A. Poor adaptation to changes in light and poor night vision are some of the initial symptoms of vitamin A deficiency.

Yamamoto® Nutrition presents Vitamin A 1200mcg. Vitamin A is a dietary supplement that provides 1200 mcg of Vitamin A, indicated in cases of reduced dietary intake or increased needs.
Vitamin A contributes to the normal function of the immune system and to the maintenance of normal skin and vision.

Science understands the role of vitamin A primarily in relation to its effects on the visual system. The human retina contains four types of photopigments containing vitamin A: rhodopsin, found in the rod cells (the retinal cells responsible for night vision), and three iodopsins, found in each of the different cones responsible for daytime vision (blue, yellow, and red). The form of vitamin A found in these pigments is the 11-cis isomer of the aldehyde vitamin A (retinal). When a photon of light strikes the rod cell, the 11-cis retinal separates from the rhodopsin molecule, resulting in opsin and all-trans retinol. This reaction causes a change in membrane potential and subsequent transmission of the visual impulse.

When there is a flash of bright light (such as car headlights), a temporary discoloration of the rhodopsin occurs. It may take a few seconds for the retina to regenerate and vision to return. If vitamin A levels are low, it takes longer to adapt. Poor adaptation to changes in brightness and poor night vision are some of the initial symptoms of vitamin A deficiency.