Keratin

Also known as hydrolyzed keratin, keratin protein

What is keratin?

Keratin is the protein that makes up about 90% of each hair strand, plus your nails and the outer layer of your skin. Heat, bleach, and brushing chip away at it. Keratin shampoos, masks, and treatments patch those weak spots so hair feels smoother and breaks less.
Best forDamaged hair Frizz Breakage Hair strength

Products with keratin

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Pairs well with

  • Biotin
  • Peptides
  • Panthenol
  • Hair oils

Use with caution

  • Too much protein on fine hair (it can feel stiff)
  • Salon treatments that release formaldehyde

Keratin FAQs

Keratin fills in the damaged spots along each strand. Hair looks smoother, shinier, and breaks less.

Use a keratin shampoo as often as you wash, and a keratin mask once a week. Cut back if your hair starts to feel stiff.

They are different. A shampoo adds a light coat of protein, and a salon treatment uses heat and chemicals to smooth hair for months.

Keratin products help curly hair that is damaged or frizzy. Follow with a moisturizing conditioner so curls stay soft.

Related reading

This content on this page is for general information only and is not medical advice. Always speak to a dermatologist before starting a new skincare routine.