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I really believed this one for a long time; after all, isn’t water the new fountain of youth? Apparently it isn’t when it comes to youthful skin. So far there’s no connection between guzzling down 8 or more bottles of water a day and collagen production. Collagen is the main protein of connective tissue, which keeps your skin firm. They do say that eating fruits and veggies do a better job keeping the skin elastic because they contain vitamins A, B, C and E.