Keratin VS Cysteine Hair Straightening Treatments – Everything You Need to Know


We know that girls having curly hair looking to pamper these curls although wavy curls are really a matter of pride. If you intend to straighten the curls, we are there to help. No, we aren’t telling that the solution is in a flat iron because straightening lasts until the next wash. To achieve long-lasting straightening, girls need to choose between Cysteine hair treatment or Keratin treatment. Wondering what we are talking about? Read on to know about the difference between the two methods.

Cysteine straightening treatment


The Cysteine treatment for straightening hair is done by using non-essential amino acids that occur in keratin to strengthen your hair. In this treatment, if you have very tight curls, the ingredient relaxes the hair without using additives such as formaldehyde.

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Cysteine is a nonessential amino acid which occurs in keratin and many other proteins. When used for hair straightening treatments, cysteine is considered to be safer and affordable than the traditional keratin treatment. Cysteine smoothing treatment works slowly, relaxing the hair’s curl. It does this without using harmful additives such as formaldehyde.

The cysteine hair treatment method is made up of four very basic steps. First, the hair needs to be shampooed using cysteine smoothing shampoo. Second, use the protein leave-in conditioner, followed by a hair straightening protein and cysteine smoothing treatments. The result is sleeker, smoother hair with less damage.

Also Read: Hair Smoothening Procedure – Know it All!

How does it work?

The cysteine hair treatments are perfect for people who have unmanageable and frizzy hair as it strengthens the hair roots. In the treatment, the straightening is done naturally without looking obvious. But, it is a semi-permanent treatment that lasts for three months.


Procedure for the Cysteine treatment is not different from Keratin treatment.

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  • First, hair is washed and dried to prepare for the treatment. Clean hair is required for better penetration of cysteine.
  • After blow-drying and cleaning, the Cysteine complex is used on the hair, taking a small section of it, so the hair is exposed to the cysteine complex.
  • This product is allowed to remain on hair for around 45 minutes.
  • The next step is to blow dry and ironing the hair to have a sleek look.
  • Then the hair is rinsed.

It is advised to apply a sulfate-free shampoo after the treatment.

Why Cysteine is a better option than Keratin?

Cysteine is considered a better option than keratin because:

  • This method doesn’t require the use of formaldehyde and any other substitutes of formaldehyde that releases harmful fumes during the treatment
  • The treatment doesn’t alter the hair structure permanently.
  • It stays there for a limited period unlike the Keratin treatment

Also Read: Best Way to Create Loose Waves Using Curling Iron

What is the keratin straightening treatment?


In this particular treatment, the hair stylist would apply keratin by infusing into the hair through creams and using hot flat iron to absorb keratin on your hair. It takes around 90 minutes depending on the overall length of the hair.

Keratin is a kind of protein that occurs naturally in hair. During the keratin hair straightening treatments, several products such as Brazilian keratin treatment, and any other salon products are used for curly and smooth wavy locks. The heat of the flat iron seals the hair. The procedure takes around 90 minutes and more depending on the length of hair.

There are many perks of using the keratin hair straightening method. Not only does this treatment smooth hair, but it also removes frizz. The results of the treatment might last a few months, but could be seen for a longer period of time by the use of sodium sulfate free shampoos. Many salons recommend not washing the hair for four days following the treatment to give it enough time to work.

Also Read: 6 Best Ponytail Hairstyles to Make Your Look Glamorous

How does it work?

This treatment is quite affordable as compared to Cysteine and leaves the hair shiny and smooth. So if you wish to go a notch higher than the hair rebonding, it could be the next step. But it could cause health issues like Keratin straightening including the use of formaldehyde, which if inhaled could be rather harmful.


Shampoo your hair

Wash the hair with a keratin shampoo for getting complimentary ingredient benefits. In case you have straight hair, wash them twice; if you have curly hair, wash it once more.

Do massage treatment

Towel dry the hair gently but leave moisture so hair could easily absorb the products. Coat the strands with keratin treatment, starting the tips going up. Stop at an inch from scalp. Gently massage the hair with the products.

Leave the treatment for 30 minutes

With the product still on the hair, comb the locks with a wide-tooth comb. Now, let the treatment stay on your hair for about 30 minutes

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