Beauty treatments are a popular and effective way to care for your body — whether focused on skin, nails, or hair. Salons offer a wide variety of services tailored to individual needs and expectations. Among the most sought-after are hair treatments, with regular salon visits becoming a standard part of modern self-care. But increasingly, clients are looking beyond simple cuts and colour — they are turning to specialised restorative treatments like keratin treatments. So what exactly is keratin, how does it work, and is it worth the investment?
What Is Keratin?
Keratin is a specialised structural protein produced in the hair follicles. It forms the primary component of the hair shaft — specifically the cortex, the innermost and most important layer, which is built from spiralling protein fibres connected by chemical bonds. Keratin is one of the most critical factors determining your hair's structure, appearance, and overall condition. It influences whether hair is smooth, shiny, and resilient, or dry, brittle, and prone to splitting.
Interestingly, the type of keratin bonding in your hair directly determines whether it grows straight or curly — this is genetically programmed at the follicle level.
Keratin is not limited to hair. It is also the building block of nails and skin. In the skin, keratin is produced through a process called keratinisation, where skin cells gradually harden and form the protective outer layer of the epidermis. In nails, keratin is responsible for hardness and structural integrity — which is why keratin deficiency often shows up as brittle, peeling nails alongside hair problems.
[tip:Keratin is the same structural protein that makes up your hair, nails, and the outer layer of your skin. When keratin levels are depleted — through heat styling, colouring, or environmental damage — all three can suffer simultaneously.]How Does Keratin Benefit Your Hair?
Thanks to its versatility, keratin can have a transformative effect on hair structure. When hair loses its natural keratin through damage, chemical treatments, or environmental exposure, replenishing it — either externally through products or internally through nutrition — can deliver a wide range of benefits:
- Adds shine and lustre — smooths the hair cuticle for a glossy, light-reflecting surface
- Nourishes along the full length — delivers conditioning from root to tip
- Provides deep moisture — restores hydration to parched, straw-like hair
- Improves softness — makes hair noticeably smoother and more pleasant to touch
- Boosts volume — strengthened hair appears fuller and more substantial
- Seals split ends — closes the hair cuticle to prevent further splitting
- Protects against damage — creates a shield against heat styling, chemical processing, and harsh weather
- Rebuilds after mechanical damage — repairs harm caused by aggressive brushing, backcombing, and tight hairstyles
In essence, keratin acts as both a repair agent and a protective barrier — addressing existing damage while preventing further deterioration.
How to Use Keratin for Hair Care
There are two main approaches to keratin hair care: topical products (shampoos, masks, conditioners) and professional keratin treatments such as keratin straightening. Both deliver keratin to the hair, but in different ways and with different levels of intensity.
Keratin in Everyday Hair Products
The simplest way to maintain keratin levels is through keratin-enriched hair care products used as part of your regular routine. When choosing these products, pay attention to the type of keratin used:
Hydrolysed keratin is the gold standard in hair care formulations. Hydrolysis breaks keratin down into smaller molecular fragments through a reaction with water, allowing the protein to penetrate the hair shaft far more effectively than whole keratin molecules. Shampoos, masks, and conditioners containing hydrolysed keratin deliver the most noticeable results.
Keratin shampoos for coloured hair also deserve special attention. Hair colouring inevitably damages the hair structure, and using a keratin-enriched wash helps rebuild and strengthen the hair after each colour treatment, extending both the life of the colour and the health of the hair.
Explore our hair cosmetics collection for a range of treatments and care products.
Keratin Straightening — The Professional Treatment
Keratin straightening is a salon procedure that infuses the hair with concentrated keratin, then seals it in using heat (typically a flat iron). The result is smooth, straight, deeply conditioned hair that can last for several weeks to months depending on hair type and aftercare.
This treatment is particularly popular with people who frequently straighten their hair with heat tools — keratin straightening reduces the need for daily heat styling, which in turn reduces ongoing damage.
DIY Keratin Treatment at Home
It is possible to perform a keratin treatment at home, but several important precautions apply:
- Choose the product carefully — home-use keratin treatments should be formaldehyde-free. Formaldehyde-based formulas are too strong for unsupervised application and can cause irritation. Always check the ingredients list before purchasing.
- Prepare your hair properly — for at least 12 hours before the treatment, avoid applying any masks, conditioners, or oils. These products coat the hair and prevent keratin from penetrating effectively.
- Follow the manufacturer's instructions precisely — depending on the product, hair may need to be damp or dry. Always detangle thoroughly before application.
- Leave a 2 cm gap at the roots — do not apply keratin directly to the scalp or root area. Start approximately 2 cm from the roots and distribute evenly to the ends using a fine-tooth comb.
- Respect the processing time — leave the product on for exactly as long as directed, then blow-dry and straighten thoroughly to seal the keratin into the hair.
What Results Can You Expect?
After a keratin straightening treatment, you can expect:
- Straighter, smoother hair — ideal for those who rely on daily heat straightening
- Intense moisture and shine — deeply conditioned, visibly healthier-looking hair
- Reduced frizz — the sealed cuticle keeps humidity out and smoothness in
- Rebuilt structure — damaged areas are filled and reinforced with protein
One important consideration: keratin can lighten colour-treated hair. A chemical reaction between the keratin formula and hair dye can cause a noticeable shift in tone. This does not typically affect natural, uncoloured hair.
Supporting Hair Structure From Within
While topical keratin treatments deliver visible external results, the long-term health of your hair depends equally on what you provide from the inside. Your body needs specific nutrients to produce keratin naturally and maintain strong, resilient hair:
Biotin (Vitamin B7) — one of the most directly linked nutrients to keratin production. Biotin contributes to the maintenance of normal hair and supports the structural protein framework that gives hair its strength.
Silicon — an essential trace mineral for connective tissue, silicon supports hair thickness, elasticity, and overall structural integrity. Available in both capsule and convenient liquid form.
Zinc — contributes to normal protein synthesis — the process through which your body builds keratin. Zinc deficiency is one of the most common nutritional contributors to hair loss and thinning.
Collagen + Vitamin C — collagen provides amino acids that the body uses to build keratin and other structural proteins. Vitamin C is essential for collagen synthesis, making this combination doubly effective for hair support.
Comprehensive hair formulas — multi-ingredient supplements designed specifically for hair, skin, and nails combine several of these key nutrients in one product for convenient daily support.
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Is Keratin Worth It?
The short answer is yes — but with nuance. Keratin treatments and keratin-enriched products can deliver genuinely impressive results for damaged, frizzy, or over-processed hair. The key is choosing the right approach for your needs: everyday keratin shampoos and masks for maintenance, professional or at-home treatments for intensive repair, and targeted supplementation to support your body's own keratin production from within. When combined thoughtfully, these approaches create a complete strategy for stronger, shinier, healthier hair.
Key Takeaway: Keratin is the structural protein that determines your hair's strength, shine, and resilience. Replenish it externally with hydrolysed keratin products and treatments, and support natural production from within with biotin, silicon, zinc, and collagen supplementation. For home treatments, always choose formaldehyde-free formulas and follow application guidelines carefully.
