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J Am Acad Dermatol. 1985 Jul;13(1):97-102. Related Articles, Links
Uncombable hair syndrome: observations on response to biotin and occurrence in siblings with ectodermal dysplasia.
Shelley WB, Shelley ED.
Three children are reported with uncombable hair syndrome, consisting of slow-growing, straw-colored scalp hair that could not be combed flat. The hairs appeared normal on light microscopy but on scanning electron microscopy were triangular in cross section, with canal-like longitudinal depressions. Oral biotin, 0.3 mg three times a day, produced significant improvement after 4 months in one patient, with increased growth rate and with strength and combability of the hair, although the triangular shape remained. The other two patients were unique in having associated ectodermal dysplasia. Their hair slowly improved in appearance and combability over 5 years without biotin therapy.
Uncombable hair syndrome: observations on response to biotin and occurrence in siblings with ectodermal dysplasia.
Shelley WB, Shelley ED.
Three children are reported with uncombable hair syndrome, consisting of slow-growing, straw-colored scalp hair that could not be combed flat. The hairs appeared normal on light microscopy but on scanning electron microscopy were triangular in cross section, with canal-like longitudinal depressions. Oral biotin, 0.3 mg three times a day, produced significant improvement after 4 months in one patient, with increased growth rate and with strength and combability of the hair, although the triangular shape remained. The other two patients were unique in having associated ectodermal dysplasia. Their hair slowly improved in appearance and combability over 5 years without biotin therapy.
...I didn't know Biotin could do all that. I'm still waiting for it to help make my nails stronger!

.It contains 1200mcg=400% daily value. I started taking them exactly Dec 31th, 2004 and now I have hair everywhere. My hairlines now have more hair and also notice that my babyhairs are growing more down onto my face. The hair on my legs, armpits and hands are getting way out of control. I feel like a damn gorrilla
. I have to shave soon. But so far so good