Protein filler for bleached hair: What is it used for and how do you use it?

fix it with protein treatments

  • Protein fillers are treatments that are used to recover the health of hair that has been damaged, for example, from bleaching.
  • It is applied as a hair mask, repairing oils, or shampoo and conditioner.
  • They are easy to use at home. There is no need to go to the beauty salon.


Every change we make to our hair causes damage.

Bleaching is the most aggressive treatment that can be done to hair.


Your hair cuticles open during the bleaching process so that your hair fiber releases the color, natural or artificial.

You already know that after you bleach your hair, you must hydrate it. But what role do these proteins play in this hydration?


 They are fundamental. They are the ones in charge of strengthening, repairing, and filling the empty spaces that might be left behind after the bleaching. 

The secret is that these proteins slow down water loss; therefore, your hair stays hydrated longer.


There are many types of protein filler treatments, depending on your needs, and they all achieve excellent results.

  • I will now tell you when to use protein filler treatments
  • How to use them correctly
  • How often you should use them to make sure your hair stays strong and healthy


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What is the purpose of protein filler treatments for bleached hair?

repair hair

Protein fillers are hair fiber treatments that are used to recover or fix damaged hair.


Hair is mostly made from keratin.

I am sure you have heard of the wonders that keratin can do for your hair.

And it is obvious since you are applying the protein that your hair needs most to be strong and healthy.


 Hair becomes extremely dry after a bleaching session. Even if you don’t notice, the bleaching has caused deed damage to your hair. Protein fillers are the solution to this problem. 

You might be wondering why it is called a protein filling instead of a protein treatment.


To be honest, the names are interchangeable.

It is referred to as a protein filler because when you apply the treatment to your hair, the proteins fill in the hair fiber’s empty spaces.

In turn, all your hair fiber will be even without holes or empty spaces.


This is the reason why your hair is left so soft and manageable after the protein treatment.

There are no more empty spaces that might feel rough to the touch or difficult to detangle.


How can you tell if your hair needs a protein filler treatment?

I am sure that you are already itching to go to the beauty supply store or pharmacy to buy a protein filler treatment.

But, wait! You must find out if you really need it for your hair.


 Not all bleached hair is in need of a protein filler treatment. 

Your hair must be deeply damaged, not just dry and brittle.

How do you know if your hair is deeply damaged?


  • If you lose small pieces of hair when you brush it.
  • If it’s difficult to detangle when it’s dry.
  • If you brush it while wet and it bounces up like rubber.
  • If it’s excessively frizzy and the hair is cracked at different lengths.


All of the above, most of the time, are side effects of a bad bleaching job.

If you can check off two of the items mentioned above, then your hair fits the criteria of needing a protein filler treatment.


 I must warn you that if your hair does not fit any of the criteria mentioned above, then your hair does not need a protein filler treatment. 

If a protein filler treatment is applied to relatively healthy hair, you will end up with hair that feels heavy and has no movement.


The proteins retain the water in the hair fiber. This is the reason why the hair is so soft and manageable after the treatment.

You must apply the protein filler treatment on dry and damaged hair to get the best results.


Which filler should I choose, and how should I use it to get the most benefits?

A protein filler treatment is easy to apply and can be easily done at home.

The fillers come in various applications, and you can choose the one you like or the one you have access to.


You can find a wide range of protein fillers:

  • Protein shampoos
  • Conditioners with proteins
  • Hair masks with proteins
  • Repairing protein oils


All of these products are easy to use. They can be found in a beauty supply store, pharmacy, and even grocery stores.


You will see various types of proteins: keratin, silk, and wheat.

They all work, and there isn’t one better than the other.


You will see products with blended ingredients like keratin with dried fruit, keratin with silk and wheat, keratin with vitamins, keratin with coconut, etc.

 Keratin is the main component in your hair, and it is a must-have in protein filler treatments. 

If you wash your hair every 48 hours, minimum, with a combination of the shampoo and conditioner with proteins, you will notice a change in just a few weeks.


  • The hair masks can be used after you wash your hair shampoo without applying conditioner.
  • You must let it sit in your hair for at least 10 minutes.


The repairing oils are applied after you wash your hair with shampoo and cream rinse.

You can only apply them on wet hair and at the ends.

This type of treatment does not require rinsing and can be applied every 72 hours.


Some protein filler treatments are exclusively done at the beauty salon, almost like an overdose of keratin.

This treatment completely repairs the damage to the hair.

It must be applied by a professional since the fumes can be damaging to your health.


How often should I apply the filler?

The frequency of treatment will depend on the needs of your hair.

If at this moment your hair is really damaged, then I recommend the following:

  • Shampoo and conditioner: Every time you wash your hair
  • Protein hair masks: At the beginning of the treatment, you must apply them twice per week and at least for a month.
  • Repairing oils: You can use them every day if you wish. Just make sure that the hair is wet and that you don’t apply it to the roots.

As you use the treatment, you will notice how slowly but surely your hair is recovering.


Consistency is key to get the most benefits from the treatment. It will not help you buy it, use it for one or two days and then leave the products in the corner of your bathroom counter.

You must follow the intensive treatment for at least 6 weeks if you truly want to repair your hair.

Once you notice, by its texture and how much easier it is to manage, that your hair is getting stronger and healthier, you can begin to space out the treatment.


Oh, one final but important thing. You MUST NOT dye your hair throughout this reparation process and, of course, not bleach it. If you do any of these things, you will lose all the progress made or permanently damage your hair. If you want to repair your hair completely, you must give it time.

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