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Glossary Keratin 2

protein providing structural strength to skin, hair, and nails

Keratin 2 (KRT2) is a type of protein found in the outer layer of the skin, hair, and nails. It plays a crucial role in providing structural strength and resilience to these tissues, helping to protect them from damage and wear. Mutations in the KRT2 gene can lead to skin disorders such as ichthyosis bullosa of Siemens, which is characterized by blistering and scaling of the skin.

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Research

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The Human Type I Keratin Gene Family: Characterization of New Hair Follicle Specific Members and Evaluation of the Chromosome 17q21.2 Gene Domain

research The human type I keratin gene family: Characterization of new hair follicle specific members and evaluation of the chromosome 17q21.2 gene domain

70 citations , December 2004 in “Differentiation”

This study identifies six novel keratin genes from the chromosome 17q21.2 region, suggesting their association with hair follicles, while all 27 keratin genes in the domain have been characterized transcriptionally.

research Autosomal Recessive Hypotrichosis with Woolly Hair Caused by a Mutation in the Keratin 25 Gene Expressed in Hair Follicles

50 citations , February 2016 in “Journal of Investigative Dermatology”

A mutation in the KRT25 gene causes a rare hair disorder with thin, woolly hair.

research Ontogeny and regional variability of keratin 2e (K2e) in developing human fetal skin: a unique spatial and temporal pattern of keratin expression in development

19 citations , April 1999 in “British Journal of Dermatology”

This study shows that keratin 2e exhibits distinct temporal and regional expression patterns in fetal epidermis, suggesting different regulatory and functional roles from other epidermal keratins.

research The Study on Biological Function of Keratin 26, a Novel Member of Liaoning Cashmere Goat Keratin Gene Family

14 citations , December 2016 in “PloS one”

This study found that Keratin 26 is expressed differently in hair follicle phases, particularly during catagen and telogen, influencing cashmere growth and interacting antagonistically with the BMP signaling pathway.

Hair Keratin Associated Proteins: Characterization of a Second High Sulfur KAP Gene Domain on Human Chromosome 21 in Fond Memory of Dr. Peter Steinert

research Hair Keratin Associated Proteins: Characterization of a Second High Sulfur KAP Gene Domain on Human Chromosome 2111In fond memory of Dr Peter Steinert.

62 citations , January 2004 in “The journal of investigative dermatology/Journal of investigative dermatology”

This study identified 16 novel high sulfur KAP genes and two KAP pseudogenes on chromosome 21q23, showing expression in a specific region of the hair fiber cuticle.

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Community Join

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community Finally seeing some progress 24M

in Progress Pictures 24 upvotes 10 months ago

A 24-year-old male experienced hair loss and side effects from oral finasteride and minoxidil, but saw progress with a topical solution of minoxidil and finasteride, alongside dermastamping and vitamin supplements. He uses 2% Nizoral and keratin shampoo for hair care.

community This is just a 45 day difference

in Progress Pictures 51 upvotes 1 year ago

The user started oral finasteride on February 3, 2025, and uses topical minoxidil, Nizoral, derma stamping, Vitamin D3 + K2, and biotin/keratin for hair loss. They reported significant progress in 45 days.

community 28m - Last 26 days have been great

15 upvotes 9 months ago

A 28-year-old male shares his hair regrowth progress using finasteride, topical and oral minoxidil, hair peptide serum, ketoconazole shampoo, dermastamping, multivitamins, and a high-protein diet. He reports noticeable hair growth and minor side effects, emphasizing patience as key to success.

community Started Jan 1st on 5mg minoxidil and 0.5mg dutasteride progress pic (28M)

in Is this regrowth? 87 upvotes 6 months ago

A 28-year-old started using 5mg minoxidil and 0.5mg dutasteride on January 1st and noticed hair regrowth at the temples. Users discuss the effectiveness of oral minoxidil, dutasteride, and the potential for hair to become terminal.

community 20m. 1mg fin. Week 8

4 upvotes 9 years ago

A user reports positive results with finasteride, noticing thicker hair and regrowth at the temples and hairline. Another user shares their experience with minoxidil, noting small hairs that haven't grown, and plans to add finasteride to their regimen.

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Clinics

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Learn

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learn Overview

learn Keratin

What role does keratin play in strengthening weak or thinning hair? Keratin strengthens hair by forming protective structures that prevent breakage and thinning.
Are keratin treatments good for people with alopecia, or do they only improve the hair’s appearance? Keratin treatments improve hair appearance but do not address alopecia or stimulate growth.
Is keratin in shampoos and conditioners actually absorbed by the hair, or does it just coat the surface? Keratin in shampoos mainly coats the hair rather than being absorbed.
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