Is Keratin Treatment Good For Thin Hair? It depends on how much hair you have

  • Yes, keratin treatment is good for people with thin and a lot of hair. The treatment will strengthen their hair and reduce frizz. If you have a small amount of hair, this treatment isn’t recommended.
  • It’s neither the right treatment if you’re looking to straighten your curly and fine hair for good.
  • Also, you should avoid keratin treatments that contain formaldehyde because they could leave your fine hair on the verge of breakage.
  • And if after having keratin treatment on your fine hair, you notice that it has little volume, you can complete the treatment with a half bob or short bob because it’ll show off the treatment results.


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Before having a keratin treatment on your thin hair, you should evaluate several issues.

For example, high-density thin hair is not the same as low-density thin hair.

Nor is healthy thin hair the same as brittle and dehydrated thin hair.


In general,  a keratin treatment will have many benefits for your thin hair because it strengthens the existing keratin in your own hair.  Do you know what keratin is?


Keratin is a protein that forms hair and nails. Our body produces it naturally.

But with time and successive hair treatments or the abuse of heat tools, keratin weakens and disappears. This causes fine hair to frizz and look dull.


If you have thin hair,  a keratin treatment will give you extra moisture and repair your hair by nourishing it from root to tip. It’ll make it look silky and shiny. 

However, as every hair is different, this kind of treatment isn’t recommended for all thin hair.

Do you want to strengthen your thin hair with a keratin treatment?


Then, stay with me because I’ll tell you:

  • In which cases is a keratin treatment for thin hair convenient?
  • What are the advantages and disadvantages of keratin treatment for thin hair

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In which cases is keratin treatment for thin hair a good choice?

The first thing to think about is what you want to achieve with a keratin treatment on thin hair.

For example, do you have fine, curly hair and want to straighten it with keratin?

Sorry to be the messenger of the bad news.


  • A keratin treatment won’t work to straighten your thin, curly hair.

And it won’t because keratin doesn’t straighten the hair on its own. It’s an essential hair protein and it acts as a moisturizer, conditioner, and hair repairer, but it doesn’t straighten the hair.

 For the product to straighten hair, it must contain other ingredients that are actually responsible for that process.  What you will achieve with keratin on your straight and curly hair is to smooth the curls and reduce frizz, but you’ll never straighten it completely.


  • The keratin treatment will strengthen your fine brittle hair.

smooth and frizz-free hair

It’ll help boost protein levels from roots to ends. It means your hair will be stronger, frizz-free, and much shinier.

In this case, because your hair is brittle, you need to carefully choose the type of keratin treatment you apply to your hair. What do I mean by this?


That  before you sit in the chair for the stylist to apply the keratin treatment, you should ask her if it contains formaldehyde. 

If the stylist looks at you with a blank face, you notice that she turns around a thousand times before answering you, or that she replies yes, run away!

A keratin treatment with formaldehyde could leave your thin and brittle hair even drier and burned.


  • If your hair is thin and scarce, I don’t recommend a keratin treatment.

A keratin treatment won’t give you volume but quite the opposite. By eliminating frizz and nourishing the hair fiber, it’ll flatten and decrease the volume of your hair visually.


Therefore,  if in addition to having thin hair, you have little volume or wear it very short, a keratin treatment will give you the appearance of having much less hair. 


Regardless, if you want to have a keratin treatment, avoid wearing your hair extra long. If you do, it’ll look straight and without volume, as if it suffered from a hair density lack.

Therefore, I recommend that in addition to having a keratin treatment, you try a haircut that allows you to show off the results of the procedure.

You can opt for haircuts that do not need to be worked and keep their shape after washing, such as a half bob or a short bob.


Pros and cons of keratin treatment on thin hair?

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  • Rebuilds the hair fiber.
  • Nourishes and restructures the hair in a natural way
  • Stronger hair
  • Thin hair easier to comb
  • Eliminates frizz
  • Brings shine and vitality to your hair



  • The most common keratin treatments are toxic because they contain formaldehyde. When you apply it to your thin hair, it can damage it and burn it.
  • It’s an expensive treatment.
  • It can cause allergic reactions to the skin, scalp, and eyes.
  • It should not be applied to people with low-density thin hair.



Thin and brittle hair tends to suffer seasonal changes, stress, pollution, poor diet, and other external factors more than other hair types.

Therefore, if you apply a keratin treatment to your fine hair, it’ll be more restructured and shiny.


But remember, if you have thin, curly hair and are looking for total straightening, a keratin treatment is not for you.

And finally, you should make sure that the keratin treatment you apply on your thin hair doesn’t contain formaldehyde. The aim is to avoid breaking and burning your hair, especially if it’s weak and dry.

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