10 Best Keratin Shampoos 2025 in the UK

The Kérastase Resistance Force Architecte Shampoo is a strong contender in the keratin shampoo category, especially for individuals with damaged and brittle hair. Its formula is enriched with Vita-Ciment technology, Pro-Keratin, and Ceramide, which are all geared towards strengthening and protecting hair from breakage and external aggressors. While the product does not explicitly state being sulfate-free, its focus on hair repair and protection is evident.

This shampoo is particularly well-suited for those with damaged hair, whether fine or thick. Its moisturizing qualities come from the Pro-Keratin and Ceramide components that help in rebuilding the hair fiber, making it resilient and less prone to damage. It does not have a scent, which might be a plus for those sensitive to fragrances, but could lack appeal for users who prefer a pleasant aroma during hair washing.

Kérastase is a reputable brand known for its quality hair care products, enhancing its appeal to users seeking reliable solutions for hair care concerns. The instructions for use emphasize a thorough regimen, suggesting a double cleanse focusing on different hair sections, which might be beneficial but may also be considered time-consuming for some users.

Its 250 ml size offers an average quantity that should last users a reasonable amount of time, depending on usage frequency. The shampoo's focus on strengthening and protecting hair makes it an excellent choice for those with severely damaged hair, although it might not provide the desired benefits for those with other hair types or concerns.

The NYK1 Salt and Sulphate Free Shampoo is designed for individuals who have undergone keratin treatments or have color-treated hair. A standout feature is its sulfate-free and salt-free formula, which is gentle on the hair and helps prolong the life of keratin treatments and hair color. This is particularly beneficial as regular shampoos can strip treatments and colors within just a few washes. The inclusion of coconut oil is a plus, providing moisture and conditioning to keep hair shiny and soft.

Additionally, it is also paraben-free, reducing the risk of scalp irritation and inflammation, making it suitable for sensitive scalps. Another advantage is its versatility, being compatible with hair extensions, ensuring that the extensions remain in good condition without causing them to tangle or lose their curl. However, a potential drawback might be its scent, which is coconut; while pleasant to many, some users might prefer a different fragrance. Also, users should be aware that the product is on the higher end in terms of price, which might be a consideration for budget-conscious buyers.

With a solid reputation and positive customer reviews, it ranks well among shampoo and conditioner sets, indicating general consumer satisfaction. This shampoo is a good choice for those looking to maintain their hair treatments and color while keeping their hair healthy and moisturized.

The Kerastase Nutritive Bain Satin Riche shampoo is designed for individuals with damaged hair, making it potentially beneficial for those looking to strengthen and revitalize their hair. A standout feature is its moisturizing capability, which is essential for nourishing and restoring health to damaged strands.

One of the strengths of this shampoo is its sulfate-free formulation, which is gentle on hair and helps prevent further damage, making it suitable for individuals with sensitive scalps. The absence of aluminum further enhances its appeal for health-conscious consumers seeking a cleaner product. KÉRASTASE has a solid reputation and positive customer reviews—averaging 4.5 stars from 250 ratings—highlighting general satisfaction.

In terms of hair type compatibility, its focus on damaged hair could limit its effectiveness for those without this specific need, but it will likely be appreciated by those who do. The product's non-descript scent might appeal to users who prefer subtle or no fragrance in their hair care products. For those prioritizing brand reputation and a sulfate-free formula for damaged hair, this shampoo is a strong candidate.