You would have to be living under a rock to not have heard the term ‘keratin’ when it comes to haircare. It is often found in salon treatments, hair masks, and shampoos that promise smoother, stronger and a significantly healthier looking head of hair.
So what is hair keratin and why do we need it?
Hair keratin is a structural protein that gives the hair fibre much of its strength and shape. But once the hair has emerged from the shaft, it is not a living tissue anymore which means it cannot heal by itself the way skin does. What haircare can do is reduce further damage and temporarily improve the physical properties of the fibre.
Understanding that distinction is the first step towards genuinely effective keratin damage repair.
What Is Hair Keratin & Why It Matters
Keratin is a protein present in your hair and is made up of amino acids. Within the hair fibre, keratin proteins are held together by different types of chemical interactions. These structures help give hair its characteristic strength and resilience.
When the internal protein structures are altered, hair can become more porous, rough, brittle and prone to breakage.
What is important to understand here is that strengthening your hair does not mean adding more keratin to it. It is about protecting the keratin present in your hair and preventing more damage by using ingredients that can improve the hair’s physical properties.
Common Causes of Keratin Depletion
Repeated stress on hair can build up over time and result in a weakened structure. The issue is that hair is exposed to a variety of influences everyday. Washing it too frequently, brushing aggressively, friction from wrong fabric on bedding, styling elements, natural contaminants can all create a not-so favourable condition for the hair to remain strong. And so, the hair fibre may slowly start withering.
Chemical treatments like bleaching and colouring are certainly no help either. And pulling stubborn knots becomes the kind of mechanical stress that can impact the hair’s outer protective layer.
Heat, Chemical & UV Damage to Strands
Three of the biggest external stressors on hair are heat, chemical processing and ultraviolet radiation.
Heat
The tools used in regular life for convenience and styling purposes like blow dryers, straighteners and curling irons can impact the hair fibre significantly. Heat application should be minimized in intensity and frequency to ensure the hair has time to recover.
Arata’s range of hair styling products were formulated and backed by scientific trials to best combat these concerns.
Chemical processing
Hair can’t take a lot of bleaching, colouring or perming before its structure is altered, leaving it more susceptible to damage. Conditioning products can strengthen weak hair but sustained practices like this over time will amount to considerable damage.
UV exposure
Your hair needs protection first and foremost from the sun when you step out. We don’t talk about it enough but UV rays can impair your hair’s structural integrity.
Ingredients That Preserve & Rebuild Keratin
The idea is to protect the keratin that is present, strengthen it and to produce more of it so your hair can successfully regain a healthier look. Here are some ways that can be combined to work together towards that goal:
Hydrolysed proteins
Hydrolysed keratin is a fragmented protein that can better interact with the hair fibre by going deeper. Research has found that certain keratin peptides can penetrate parts of the hair shaft, while larger peptides may primarily deposit on the surface and improve mechanical properties.
Many hair formulations therefore include hydrolysed proteins from plant-based sources like wheat, rice and soy.
Conditioning agents
Conditioning agents can work towards keratin damage repair because they reduce the friction between hair fibres thus, making it easier to detangle and manage. This is not a small concern because functional stress over hair does add up over time and cause additional breakage. For example, if you switch to using a damage-repair shampoo and conditioner that is specifically formulated to support hair keratin, it can act as supportive treatment that works on surface issues. Arata’s Damage Defence Super Shampoo is a good pick for everyday hair care that supports hair protein treatment for Indian hair.
Trichology-Informed Damage Repair Routine
If your goal is to strengthen weak hair, the best way to go about it is to create a routine that addresses the overall damage instead of a miracle ingredient.
Start with the basics by switching to gentle cleansers and conditioners. Apply shampoo to the scalps and let the lather run over the lengths instead of massaging them because this is generally enough and prevents unnecessary friction.
Don’t overlook conditioning because it can significantly reduce unnecessary damage by reducing friction.
Then address the major sources of damage:
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Reduce the frequency and temperature of heat styling.
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Use heat-protective products when using hot tools.
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Avoid repeatedly bleaching or chemically processing already-damaged lengths.
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Detangle gently, preferably with a wide-tooth comb.
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Avoid aggressively rubbing wet hair with a towel.
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Protect hair from prolonged sun exposure.
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Avoid tight hairstyles that create constant tension.
These measures may sound less dramatic than a salon transformation, but preventing further damage is a crucial part of any meaningful keratin damage repair routine.
At-Home vs. Salon Keratin Treatments
The word “keratin treatment” can refer to several very different things.
At-home keratin masks and hair protein treatment products generally contain conditioning ingredients, hydrolysed proteins or keratin-derived ingredients designed to improve the feel and appearance of the hair temporarily.
Salon smoothing treatments are different. They may use chemical formulations followed by significant heat to alter the hair's appearance and texture. Some hair-smoothing products can release formaldehyde when heated. The FDA advises consumers to understand the ingredients being used and notes that formaldehyde exposure can cause irritation and other health effects.
If you are considering a salon smoothing service, ask what product is being used, check its ingredient list and ensure proper ventilation.
Smoother hair is not automatically healthier hair. It may look polished while still being structurally weakened.
For keratin for Indian hair, the same principle applies: hair type alone does not determine what works. Porosity, damage level and routine matter far more.
Healthy hair is less about restoring lost keratin and more about preventing ongoing damage.
FAQs
1. Can damaged keratin be repaired naturally?
Not biologically. Hair cannot regenerate once damaged. However, conditioning and protein-based products can temporarily improve feel and strength. Prevention is the most effective strategy.
2. Does keratin treatment cause hair fall?
Not directly, but harsh chemicals or heat in some treatments can contribute to breakage or scalp irritation. Breakage is not the same as follicle-based hair loss.
3. How do I know if my hair lacks keratin?
You cannot directly measure it at home. Signs like dryness, brittleness and split ends indicate fibre damage, not keratin deficiency.
4. Are plant-based keratin alternatives effective?
They do not contain true keratin but can still condition hair using plant-derived proteins. Effectiveness depends on formulation, not just the “plant-based” label.