
08-07-2012, 07:29 PM
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While I've also read that Vitamin A (in excessive amounts) can cause hair loss, most of the data on the subject is over a decade old and it seems like general Dermatological issues are more of a concern.
Furthermore, like you stated earlier, although beta carotene is converted into Vitamin A in the body, research indicates that conversion of beta carotene to "retinoids" (Vitamin A stores in the body) is selective and, therefore, cannot cause Vitamin A toxicity (Hypervitaminosis A). What's more, because beta carotene is crucial in human visual pathways and visual acuity, it's probably not advantageous to excessively limit beta carotene from your diet.
Altogether, beta carotene cannot cause hair loss and foods containing beta carotene (carrots, leafy vegetables, etc) should not be limited from the body. However, keep in mind that excessive amounts of Vitamin A (in levels beyond the metabolic capabilities of the human liver) can, allegedly, cause Dermatological issues, including hair loss. Because of this, any type of Vitamin A regimen or restriction should be reviewed by a trusted physician.
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Blake (Future_HT_Doc)
Forum Co-Moderator and Editorial Assistant for the Hair Transplant Network, the Hair Loss Learning Center, the Hair Loss Q&A Blog, and the Hair Restoration Forum
All opinions are my own and my advice should not constitute as medical advice.
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