Does keratin damage hair?

Does keratin damage hair?

Do you want to say goodbye to frizz, enjoy a smooth, shiny and much easier to style mane? Well, surely on more than one occasion you have heard of keratin treatments to achieve a smooth, soft and strong mane. But is this product really a perfect ally?

Next, at oneHOWTO we answer the question and answer all your questions. Does keratin damage hair? Well, in order to define whether or not this product is beneficial for our hair, it is essential to know what it is and what it is really used for. Take note!

Is keratin bad for hair?

Is keratin bad for hair? To answer this question, you must know what keratin is for hair. First of all, you should know that this substance is found naturally on our scalp. It is a protein with a high fibrous capacity basically composed of sulfur and cystine. They aim to help keep our hair beautiful and stronger. Therefore, we point out that the keratin itself, it is not toxic or malicious for our hair.

However, the abuse of keratin-based treatments can make it more harmful to our hair. That is, depending on the amount of formaldehyde contained in the hair treatment, it can be harmful to keep our hair in perfect condition. In practice, keratin itself does not produce any damage by itself, but it may be that during the treatment it is mixed with some other product that contains irritating or corrosive components. In any case, you must remain calm, since at most it could cause some irritation if it were to touch the scalp and we emphasize that it is something that does not exactly happen in this treatment.

What is keratin used for hair exactly? Well, basically it serves to help the restoration of hair fibers damaged by external agents. Thanks to the keratin treatments, the hair is rehabilitated by repairing the hair from the inside and leaving it softer, with much more shine and more vitality and, above all, free of frizz.

What is keratin for hair made of?

Keratin is basically made up of cysteine, an amino acid with a high sulfur content. We naturally find it in the outermost layers of the epidermis such as nails or hair. It is a protein that our body generates by itself, but in very little quantity, so it is very common for this substance to be used in various hair treatments to maintain beautiful, soft and shiny hair.

In this sense, we can differentiate two types of keratin that have different compositions and provide different benefits to the hair: hard keratin and the soft keratin.

  • Hard or alpha keratin: contains between 15 and 18% sulfur. It gives our hair resistance and elasticity.
  • Soft or beta keratin: contains between 2 and 4% sulfur. Provides vitality and improves the appearance of our hair.

In this article we tell you how to do a keratin straightening at home step by step. Read on and find out about the best tricks.

How long does the keratin last in the hair?

The keratin treatment prevents the deterioration of the hair that is constantly subjected to weather exposure and also to other aggressive factors, such as the heat of irons and dryers or also to the chemical components of cosmetic products. Therefore, performing this type of treatment will help rebuild the hair fiber from the inside.

One of the advantages of undergoing a keratin treatment is its duration, the method can last minimum 3 months and up to 6 months you can be with your hair intact. We emphasize that it will always depend on the reaction of the hair to the treatment and your washing and care routines. Ideally, if you want to repeat the treatment is to allow between 3 and 5 months to pass.

For a longer duration it is very important to bet on a good range of shampoo and conditioner that allow you to extend the durability of the treatment. Follow the advice of your hairdresser or hairdresser to be able to keep your hair in perfect condition for longer.

What shampoo is good for keeping keratin

To maintain the keratin treatment to the maximum, that is, between 5 and 6 months, you must take into account a series of basic cares to enhance its effect. In this sense, you should pay attention to the hair care products you use and bet on those that not only fit the characteristics of your hair, but also the goal you want to achieve: to maintain the effect of keratin for longer. In case of doubts, you can always ask your trusted hairdresser so that she can recommend the best range of products for you.


As we have pointed out, choosing a good range of shampoo is essential to keep your hair healthy and strong, but also to ensure that the effect of keratin on it lasts longer. The ideal is to bet on sulfate-free products that do not interfere with the effect of the treatment. Likewise, chloride-free shampoos are recommended, since this composition tends to carry away the keratin and finally ends up eliminating it. On the other hand, it is important to look at the pH level of the shampoo. It is recommended that it is a neutral pH or without salt, otherwise, the cuticle could open and the treatment would be spoiled.


As for the conditioner, a basic of the hair care routine should also contain keratin, so that it compensates and replaces that which has been eliminated during the wash.


Do not forget to include the use of sunscreen to take care of your hair and maintain the effect of keratin, especially if you have done this treatment in summer and you are wanting to go to the beach or the pool. Sunscreen will help protect your hair when it comes in contact with chlorine or salt, as both can affect the duration of the treatment, which can be shortened.

On the other hand, if you want to avoid the loss of keratin on the beach or in the pool, our advice is that you rinse salt or chlorine quickly so that it does not act on the hair for too long.

Do not forget your goal: keep the keratin treatment so that your hair looks soft, smooth, shiny and stronger. If you want a perfect image and say goodbye to frizz, bet on this effective treatment and includes the best products to guarantee its results.

Do you want to know the types of keratin? In this article we tell you which ones are the most popular.

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