10 Reasons Your Hair Is Thinning
Watching your hair go down the drain -- literally? Find out what's normal, what's not, and what you can do about it
Turns out, not getting enough vitamin D may be just as bad as overdoing vitamin A. Researchers at Cairo University found that women who experience hair loss had lower levels of D ... and the hair loss only worsened as the levels dropped.
Researchers still aren't completely sure of the role vitamin D plays with hair follicle growth, but women should aim for a minimum of 600 IU of vitamin D per day. Good sources of the vitamin include fortified milk and orange juice, and salmon. As for the vitamin A issue, double-check your supplement labels.
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