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August 2011 in “PubMed” Hair and nail proteins, mainly keratins, are crucial for structure and can indicate health issues.
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February 1991 in “PubMed” Trichotillomania can be identified by a "Friar Tuck sign" and nail-biting.
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January 2003 in “Plastic & Reconstructive Surgery” Nail-matrical fibroblasts can make non-nail cells produce hard keratin, useful for nail repair.
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November 2008 in “The journal of investigative dermatology/Journal of investigative dermatology” Cystatin M/E helps in the final stages of hair and nail formation by controlling certain enzymes.
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January 2015 in “International Journal of Trichology” Frontal fibrosing alopecia may affect nails and could be a type of lichen planus, treatable with certain medications.
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August 1992 in “Archives of dermatological research” Lab-grown nail cells show characteristics similar to natural nail and hair.
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April 2009 in “Journal der Deutschen Dermatologischen Gesellschaft” Nail disorders not caused by infection are common and can look similar, with psoriasis being the most frequent and having specific nail symptoms.
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March 2021 in “JAAD Case Reports” Nail changes from immunotherapy can be managed without stopping cancer treatment.
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September 2007 in “Advances in therapy” INVERSION Femme supplement helped women lose weight, reduce hair loss, and improve skin and nail health.