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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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  • vitamin A is necessary for the normal growth of epithelial tissue
  • aids in the synthesis of polysaccharides
  • vitamin A is essential for formation of visual pigment, rhodopsin:
    • the aldehyde of vitamin A, retinal, is configured as the cis isomer and bound to the protein opsin
    • light modifies the molecule to switch it to its trans form
  • may have a role in protection against degenerative and neoplastic change

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