Keratin

Keratin is a natural, insoluble, fibrous protein found in large quantities in the integumentary system, i.e., nails, body hair, and hair, in both humans and animals. It is also responsible for the strength, flexibility, and shine of hair.

Chemically speaking, keratin is composed of amino acids, including cysteine, methionine, lysine, and arginine, which give it its strength and solidity.

However, over time, natural keratin production decreases, which can weaken hair and make it more prone to breakage. That's why it's important to maintain healthy keratin levels to keep your hair healthy.

Keratin is a valuable ally for hair, and here's why:

Strengthens and coats the hair fiber

By forming a protective layer around the hair, keratin protects it from external aggressions such as heat from styling tools, UV rays from the sun, and pollution.

Repairs damaged and brittle hair

Keratin penetrates deep into the hair fiber and helps repair damaged and brittle hair. It is also responsible for the elasticity of the hair, which prevents it from breaking when brushing, for example. Hair is visibly healthier and more resistant.

Smooths and reduces frizz

Keratin also has smoothing properties that help to smooth hair long-term, reduce frizz, and improve shine and suppleness. 

Hydrates and adds shine

By sealing moisture inside the hair, keratin helps maintain hydration and prevent dryness. Well-hydrated hair is not only softer and more supple, but also reflects light better, giving it a shinier, healthier appearance.

Accelerates growth

Keratin is a natural protein that strengthens hair and stimulates growth. It works by filling in gaps in the hair fiber, protecting it from external damage, and stimulating blood circulation in the scalp.

Using keratin-based products can improve hair strength, thereby promoting optimal growth.

Here are some signs that may indicate a lack of keratin:

• Dull and brittle hair:Hair that lacks keratin tends to become dull and fragile. If your hair breaks easily and seems to lack vitality despite proper care, this could indicate a lack of keratin.
• Hair loss: a decrease in hair density can also be a sign of keratin deficiency. Hair may appear flat, thin, and lack vitality.
• Slowing hair growth: slower growth and hair that seems to stop growing at a certain length.
• Brittle nails: Nails are also made up of keratin. A lack of this protein can result in brittle nails that split easily or break frequently.

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