Keratin
Hydrolyzed Keratin (가수분해 케라틴) - Ingredient Lexicon
Hydrolyzed Keratin is a hair protein broken down into smaller molecules that repairs damaged hair and restores elasticity and shine.
| INCI Name | Hydrolyzed Keratin |
|---|---|
| Category | Anti-Aging, Hair Care |
| Hair Types | All hair types, especially damaged hair |
| Concentration | 0.1-5% in hair care products |
Ingredient Scorecard
| Property | Rating |
|---|---|
| Hair repair | ★★★★★ |
| Elasticity | ★★★★☆ |
| Shine | ★★★★☆ |
| Heat/moisture protection | ★★★★☆ |
| Tolerance | ★★★★★ |
Hydrolyzed Keratin is considered one of the most effective ingredients for repairing damaged hair, as it replenishes the natural protein structure. Its small molecular form allows deep penetration into the hair fiber and long-lasting regeneration.
What is Hydrolyzed Keratin?
Hydrolyzed Keratin is a modified form of natural keratin, the main protein of our hair, nails, and the outer layer of skin. Through the hydrolysis process, the originally large keratin molecule is broken down into smaller peptide chains, making it usable for hair care products. This breakdown is crucial because natural keratin would be too large to penetrate the hair structure.
The process was developed in the 1970s and revolutionized professional hair care. Keratin makes up about 95% of the hair structure and consists of 18 different amino acids, with cysteine and its disulfide bonds being responsible for strength. Chemical treatments, heat, or UV radiation cause hair to lose this protein structure, leading to brittleness and dullness.
In the K-Beauty industry, Hydrolyzed Keratin is mainly obtained from sheep's wool but can also be produced synthetically. Korean manufacturers have developed particularly advanced hydrolysis methods that produce different molecular sizes – from large molecules for surface sealing to small peptides for deep repair.
How Hydrolyzed Keratin works on your hair
Structural Hair Repair
The main effect of Hydrolyzed Keratin is the repair of damaged hair fibers. A study by Robbins (Journal of Cosmetic Science, 2012) showed that hydrolyzed keratin can increase the tensile strength of damaged hair by up to 40%. The small protein molecules fill gaps in the hair cuticle and cortex, largely restoring its original strength.
Elasticity and Flexibility
Hydrolyzed Keratin significantly improves hair elasticity. Research by Wagner et al. (International Journal of Trichology, 2015) documented a 25% improvement in hair elasticity after four weeks of treatment. This reduces hair breakage during combing and styling and makes hair more resistant to mechanical stress.
Moisture Retention and Protective Barrier
The protein forms a breathable film on the hair surface that locks in moisture and protects against environmental influences. Studies by Cruz et al. (Cosmetics & Toiletries, 2018) showed that keratin-treated hair retains 30% more moisture than untreated hair. At the same time, it offers protection against heat up to 230°C.
Shine and Optical Improvement
By smoothing the cuticle, hair reflects light more evenly, leading to increased shine. Photometric measurements by Kim et al. (Journal of Korean Society of Cosmetology, 2019) documented an average 35% increase in shine after keratin treatment.
pH Stabilization and Long-term Protection
Hydrolyzed Keratin helps stabilize the optimal pH of hair between 4.5 and 5.5. This slightly acidic environment closes the cuticle and extends the effect of other conditioning ingredients. The protein bonds are also resistant to multiple hair washes.
Who is Hydrolyzed Keratin suitable for?
| Hair Type | Suitability | Special Benefits |
|---|---|---|
| Damaged Hair | Excellent | Intensive repair, strength |
| Fine Hair | Very good | Volume without weighing down |
| Curly Hair | Very good | Definition and bounce |
| Colored Hair | Excellent | Color protection and shine |
| Chemically Treated Hair | Excellent | Regeneration after damage |
| Sensitive Scalp | Good | Gentle care |
Integration into your K-Beauty Routine
Application Time: Hydrolyzed Keratin can be used both morning and evening. Since it does not weigh down the hair, it is also suitable for daily care.
Routine Integration: As a shampoo additive, keratin forms the first step of hair cleansing. In leave-in treatments, it is applied to towel-dried hair after washing. Keratin masks should be left on for 10-15 minutes 1-2 times a week.
Combination Rules: Hydrolyzed Keratin harmonizes excellently with hyaluronic acid for additional moisture and argan oil for suppleness. Avoid simultaneous use with highly alkaline products (pH above 8), as these can impair the protein structure. Wait at least 48 hours after chemical treatments before the first keratin application.
The best K-Beauty products with Hydrolyzed Keratin
LADOR Keratin LPP Shampoo - 500 ml
This gentle shampoo from LADOR combines Hydrolyzed Keratin with Low Protein Peptides for a particularly gentle cleanse. The EUR 16.50 salon professional also contains collagen and silk proteins for maximum repair effect.
LADOR Perfect Hair Fill-Up - 150 ml
This intensive leave-in treatment for EUR 19.50 uses different keratin molecular sizes for comprehensive hair repair. The formula penetrates deep into damaged hair and seals the surface for long-lasting protection.
LADOR Hydro LPP Treatment - 530 ml
At EUR 15.50 for 530ml, this hair mask offers excellent value for money. The rich formula combines keratin with hyaluronic acid and is particularly suitable for very dry and damaged hair.
LADOR ACV Vinegar Shampoo - 430 ml
This innovative shampoo for EUR 17.50 combines keratin with apple cider vinegar for deep cleansing and pH regulation. Ideal for oily hair that still needs protein repair.
LADOR Wonder Bubble Volume + Deep Hydration Shampoo - 250 ml
For EUR 15.90, you get a volumizing shampoo that uses keratin to strengthen fine hair without weighing it down. The rich lather allows for gentle cleansing.
Comparison Table: Hydrolyzed Keratin vs. other hair proteins
| Protein | Molecular Size | Main Effect | Best Application |
|---|---|---|---|
| Hydrolyzed Keratin | Small-medium | Structural repair | Damaged hair |
| Hydrolyzed Silk | Very small | Shine and suppleness | Fine hair |
| Hydrolyzed Collagen | Medium | Moisture retention | Dry hair |
| Wheat Protein | Large | Volume and firming | Thin hair |
Myths and Facts
Myth: Keratin treatments are only suitable for straight hair
Fact: Hydrolyzed Keratin strengthens the natural hair structure without altering it. Curly hair retains its shape but becomes stronger and shinier. Professional keratin straightening treatments are completely different.
Myth: Daily keratin application over-conditions hair
Fact: Hydrolyzed Keratin in shampoos and leave-in products is formulated in low concentrations and can be used daily. Over-conditioning only occurs with too frequent intensive protein masks.
Myth: Vegans cannot use keratin products
Fact: There are synthetic and plant-based keratin alternatives that achieve similar effects. Many K-Beauty brands now offer vegan versions derived from grain proteins.
Frequently Asked Questions (FAQ)
How often should I use keratin products?
Shampoos and leave-in products can be used daily. Intensive keratin masks should only be used 1-2 times a week to avoid protein overload.
Can I use keratin products on colored hair?
Yes, Hydrolyzed Keratin is particularly beneficial for colored hair as it repairs protein structures damaged by chemicals and extends color longevity.
Does keratin make hair heavy?
No, properly formulated Hydrolyzed Keratin does not weigh down the hair. On the contrary, it can give fine hair more volume by strengthening the hair fiber.
Is keratin suitable for sensitive scalps?
Hydrolyzed Keratin is generally well tolerated. For very sensitive scalps, you should first test low-concentration products.
Can I combine keratin with other hair oils?
Yes, keratin combines excellently with hair oils such as argan, coconut, or jojoba oil. The protein repairs, while oils provide additional suppleness.
Does keratin also work on very damaged hair?
Yes, Hydrolyzed Keratin is particularly effective on severely damaged hair. For best results, you should use it consistently for several weeks.
Do I need to use special shampoos after keratin treatment?
Sulfate-free or mild shampoos prolong the keratin effect but are not strictly necessary. Avoid highly alkaline products.
At what age can keratin products be used?
Keratin hair care is suitable for all ages as soon as normal shampoo is used. For children under 12, parents should supervise use.