Using keratin and protein on hair extensions can have several negative side effects, depending on the type of extensions, the frequency of use, and the overall hair care routine. Here’s why:
1. Protein Overload (Brittle, Stiff Extensions)
• Hair extensions do not receive natural oils from the scalp, making them more prone to dryness.
• Adding keratin or protein repeatedly can cause protein overload, leading to stiff, dry, and brittle extensions that break easily.
• Unlike natural hair, extensions cannot regulate protein-moisture balance, meaning too much protein can make them feel hard and rough.
2. Loss of Softness & Flexibility
• Extensions undergo chemical processing, often removing much of their original cuticle.
• When protein treatments are applied excessively, the extensions lose their softness, flexibility, and natural movement, making them feel rough or straw-like.
3. Increased Tangles & Matting
• Too much protein can make the extensions less smooth, increasing tangles, knots, and matting.
• This is especially true for low-quality extensions that have already been over-processed before being sold.
4. Shorter Lifespan
• Overuse of keratin and protein can lead to excessive dryness and breakage, reducing the lifespan of extensions.
• Once extensions become brittle, they cannot repair themselves, unlike natural hair.
5. Issues with Bonded Extensions
• Keratin bond extensions (e.g., fusion extensions) can be damaged by additional keratin treatments, causing bonds to break down faster or become sticky.
• Excess keratin can make the bonds harder and more fragile, leading to premature shedding.
6. Color Fading or Uneven Toning
• Many hair extensions are chemically colored to match natural shades.
• Protein-heavy treatments can cause color fading or make toners deposit unevenly, affecting the appearance of blonde or treated extensions.
How to Avoid These Issues
• Don’t use protein-based products on extensions
• Focus on hydration rather than protein. Use moisture-rich masks, oils, and lightweight conditioners to keep extensions soft. We recommend the Muk ultra soft range.
• Avoid keratin-based shampoos if wearing keratin bond extensions to prevent bond breakdown.
• Use leave-in treatments sparingly and avoid protein-based sprays or serums.
