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GlossaryCortical Cells

specialized hair cells providing strength, color, and texture

Cortical cells are specialized cells found in the cortex of the hair shaft, which is the thickest layer of the hair. These cells are responsible for providing strength, color, and texture to the hair by containing keratin and melanin. For professionals, understanding the structure and function of cortical cells is crucial for diagnosing and treating hair disorders such as alopecia.

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Acidic and Basic Hair/Nail (Hard) Keratins: Their Colocalization in Upper Cortical and Cuticle Cells of the Human Hair Follicle and Their Relationship to Soft Keratins

research Acidic and Basic Hair/Nail (Hard) Keratins: Their Colocalization in Upper Cortical and Cuticle Cells of the Human Hair Follicle and Their Relationship to Soft Keratins

356 citations, December 1986 in “The journal of cell biology/The Journal of cell biology”

Hair and nail cells share similar proteins, indicating a common differentiation pathway.

research Stiffness of Human Hair Correlates with the Fractions of Cortical Cell Types

4 citations, April 2019 in “Cosmetics”

Hair stiffness is higher when it has more para-like cortical cells.

research Cortical Cell Types and Intermediate Filament Arrangements Correlate with Fiber Curvature in Japanese Human Hair

62 citations, December 2008 in “Journal of structural biology”

Hair curvature in Japanese people is linked to specific cell types and filament arrangements in the hair cortex.

research Gene Expression of Mouse S100A3, a Cysteine-Rich Calcium-Binding Protein, in Developing Hair Follicle

40 citations, November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology”

S100A3 protein is crucial for hair shaft formation in mice.

research Fractography of Human Hair

34 citations, October 1982 in “Journal of applied polymer science”

Moisture content significantly affects how human hair breaks.

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community 4 years of progress pics (Fin only). Hair feels way less dense and is constantly itchy. 30M.

in Progress Pictures 15 upvotes 1 year ago

User has been on Fin for 6 years and shares 4 years of progress pictures, noticing less dense and itchy hair. Replies suggest visiting a dermatologist, considering Dutasteride and Minoxidil, checking bloodwork, and evaluating lifestyle factors.

community I’ve been on dutesteride and oral minoxidil for two years now and I’ve only lost ground…

in Treatment 42 upvotes 10 months ago

A user on dutasteride and oral minoxidil for two years reports worsening hair loss and is seeking advice. Suggestions include consulting a professional for underlying causes, acknowledging that treatments don't work for everyone, and considering dosage adjustments or additional treatments.