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Keratin treatment on bleached and fine hair – is it possible?

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By Fairwithhair

November 10, 2026 • 1 min read

Cocochoco Professional Keratinbehandling Pure

Bleached hair is often the hair that needs a keratin treatment the most – and yet it's the hair many people are most hesitant to treat. With the right formula, it's not only possible but one of the best things you can do for worn-out blonde hair.

Two things to keep in mind

First, bleached hair is more porous than untreated hair and absorbs product faster – apply evenly and don't leave it on longer than the instructions say. Second, heat: bleached hair tolerates a lower flat iron temperature than untreated hair, so follow the temperature guidelines and work in thin sections.

Why Gold

Cocochoco Gold is the one we recommend for bleached and fine hair. It contains pure keratin and plant-based proteins, and brings back exactly the shine that is usually the first thing to go when hair is bleached.

Not sure how light or porous your hair is? Get in touch with us before you start and we'll go through it together.

Timing with bleaching

Bleach first and do the keratin treatment afterwards, with at least a couple of weeks in between. The keratin settles like a protective layer over the freshly bleached hair. If you do it the other way round, the bleach may lift away parts of the treatment.

Aftercare for blonde hair

Sulfate-free is a must, but also be careful with silver shampoo. Many silver shampoos contain sulfates. Use Cocochoco sulfate-free shampoo as your base and tone less often – or ask us about a gentle alternative.

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