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2. Keratin - Wikipedia

   en.wikipedia.org/wiki/Keratin

   Keratin (/ ˈ k ɛr ə t ɪ n / [1] [2]) is one of a family of structural fibrous proteins also known as scleroproteins. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin in vertebrates. Keratin also protects epithelial cells from damage or stress. Keratin is extremely ...

3. Hair keratin - Wikipedia

   en.wikipedia.org/wiki/Hair_keratin

   KRT81, a type II hair keratin, is a major hair protein expressed in the hair cortex. Interestingly, despite being typically associated with hair structures, KRT81 expression has been observed in the SKBR3 human breast cancer cell line and metastatic lymph nodes of breast carcinomas, but not in normal breast epithelial cells.

4. Natural fiber - Wikipedia

   en.wikipedia.org/wiki/Natural_fiber

   The relative alignment of the keratin fibrils significantly impacts the mechanical properties. In human hair the filaments of alpha keratin are highly aligned, giving a tensile strength of approximately 200MPa. This tensile strength is an order of magnitude higher than human nails (20MPa), because human hair's keratin filaments are more aligned ...

5. Are Keratin Hair Straightening Treatments Safe? Experts ... - AOL

   www.aol.com/keratin-hair-straightening...

   A keratin treatment is a semi-permanent hair straightening method that aims to smooth and straighten frizzy or curly hair, says Ross Kopelman, MD, a board-certified hair surgeon at Kopelman Hair ...

6. Millions Of People Take Biotin For Hair Growth, And ... - AOL

   www.aol.com/millions-people-biotin-hair-growth...

   She adds that you want to look for key ingredients such as keratin, collagen, amino acids, hyaluronic acid, vitamin E, and niacinamide (B3), which can support hair, nails, and skin.

7. These Keratin Shampoos Will Transform Your Hair...Trust Me - AOL

   www.aol.com/lifestyle/keratin-shampoos-transform...

   Keasling says that the sulfate-free formula is “perfect for over-processed or damaged hair and helps build back the keratin in the hair to make it stronger and more resistant to future breakage ...