how large quantities of deep yellow orange or dark green foods impact retinal levels

Expert Solution

Deep yellow orange and dark green foods are the good source of vitamine A . Plant forms cartenoids , greatest vitamine A activity is beta carotene - deep yellow orange . Retinal is one of active form of vitamine A that fnctions in the pigment of eye . After entering the eye light strikes the visual pigment rhodopsin which is present in retina ,rhodopsin is consist of protein opsin along with retinal.Light causes change in configuration of retinal from cis to trans .Asignal is sent to the brain related to thisprocess and some retinal is lost in this cycle while some retinal returns in its original form that is cis and bind to the protein opsin .If there is deficiency of vit.A then this process of rhodopsin regenration is delayed. large quanities of deep yellow orange foods are good for eye health and clear vision but excess of vitamine A from animal source like liver can be toxic.

gladiator answered 2 years ago

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