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Keratin, a natural protein for weakened hair
Keratin is a natural protein made up of 95% of the hair fiber and plays a fundamental role in the strength, shine, and resilience of hair. This protein forms a protective barrier around the cuticle and preserves the hair's elasticity. However, over time, due to coloring, UV rays, or stress, keratin degrades, and hair becomes dull, dry, and brittle.
Fortunately, it's possible to compensate for this loss with natural supplements to revitalize your hair. Biocyte keratin hair supplements offer a targeted and natural solution, designed to strengthen the hair fiber from within.
SUMMARY
What is keratin?
Keratin is a natural fibrous protein produced by the human body and found primarily in hair, nails, and skin. Its complex structure allows it to form a strong, waterproof protective layer around the hair , making it resistant to external damage. This protein is composed of essential amino acids, including cysteine, methionine, and glycine, which create disulfide bonds responsible for hair strength.
There are two main forms of keratin:
- Hydrolyzed keratin : often used in hair care products (shampoos, masks, serums), it acts on the surface, smoothing and coating the hair
- Water-soluble keratin : produced using a patented process (like Cynatine®), it is bioavailable and acts from within, via keratin food supplements.
It is this water-soluble form that has shown the most significant results on hair strength, shine and regrowth, while also strengthening weakened nails.
The benefits of keratin protein supplementation
Undergoing a keratin treatment program allows for deep hair repair and acts on multiple levels of the hair fiber.
Deep hair repair and strengthening
Water-soluble keratin nourishes the hair fiber from the inside out. It fills gaps in the hair and restores the cohesion of keratin cells, restoring strength and elasticity.
Action on the cuticle: protection and shine
The cuticle, the outer layer of the hair, acts like armor. Under the effect of keratin, its scales close, making the hair smoother, softer and shinier .
Action on the cortex: structure and resistance
The cortex is the heart of the hair. Keratin protein supplementation helps restructure this internal zone , strengthening the fiber from within and limiting breakage.
Stimulation of the hair growth cycle
Keratin also acts on the anagen phase , the active growth period of the hair. By prolonging this phase, it promotes better hair density and more regular growth.
To learn more, discover how keratin supports healthy hair growth according to Biocyte experts.
Proven effects on nails
Studies on Cynatine® show a noticeable improvement in nail strength after 30 days. Nails become less brittle, smoother, and grow faster.
Why do your hair need keratin protein?
Every day, your hair is exposed to numerous external aggressors: pollution, UV rays, the heat from hair dryers, and chemical treatments. These factors degrade natural keratin, weakening the hair fiber.
A deficiency in the protein keratin results in: hair
- brittle and dull
- split ends
- without volume or flexibility
- difficult to style
At Biocyte, we recommend a routine of keratin-based food supplements from the first signs of fragility or after aggressive treatments.
For very damaged hair, check out our article on keratin for very damaged hair .
When should I take a keratin supplement?
Keratin supplements can be ideally integrated into a seasonal or restorative routine, depending on your hair's needs.
- With each change of season: a 1-month program to strengthen hair fibers and prevent seasonal hair loss
- For regular maintenance: 1 month every 3 to 4 months to maintain vitality and shine
- For damaged or colored hair: a 3-month routine is recommended for complete repair
- For brittle nails: keratin also affects their growth and strength.
Effective combinations with keratin
To optimize the effects of a keratin routine, certain natural combinations strengthen hair health and stimulate its growth.
Vitamins B6, B8 and zinc: a regenerating trio
These micronutrients support keratin synthesis and promote hair regrowth. They also help regulate sebum production , for a balanced scalp.
Brewer's yeast: beauty and vitality
Rich in amino acids and B vitamins, brewer's yeast is an ideal natural supplement to improve hair texture and enhance shine.
L-Methionine and cystine: structure and resistance
These two sulfur-containing amino acids are directly involved in the formation of keratin, supporting the internal structure of the hair and limiting breakage.
For a comprehensive approach, discover all Biocyte keratin food supplements , formulated for stronger, shinier and healthier hair.
In conclusion
Keratin protein is an essential ally for those who want to strengthen their hair naturally. Used in conjunction with a gentle hair care routine, it helps to repair, protect, and revitalize the hair fiber from within.
FAQ - Keratin, a natural protein
How long before you see the effects of a keratin treatment?
The first results appear within 30 days, with softer and stronger hair. After 2 to 3 months, the hair fiber is visibly denser and shinier.
Can you take keratin protein all year round?
Yes, but it is advisable to take breaks between intakes, for example 1 month out of 3. This allows your body to naturally regulate keratin production.
Are there any contraindications to taking keratin protein?
Keratin supplements are well tolerated and have no known risks at recommended doses. However, pregnant or breastfeeding women should consult their doctor before taking any supplements.
Sources
- Zague, V. et al., “Hydrolyzed keratin peptides improve hair strength and elasticity” , Journal of Cosmetic Dermatology, 2018
- Cynatine® HNS Clinical Studies, Keratec Research Group , 2015
- Giesen, M. et al., “Keratin supplementation for brittle nails and hair” , International Journal of Trichology, 2020
- Biocyte Laboratory, Internal studies on the bioavailability of Cynatine® HNS , 2022
- European Food Safety Authority (EFSA), Guidelines on hair and nail health claims , 2017
