The formalin used in the synthesis of keratin increases the risk of developing cancer, as it is a carcinogen, and once absorbed by the skin, it may lead to cancer, and it also leads to inflammation of the respiratory system, which is a major cause of hair loss and scalp sensitivity, and also causes eye allergies. As a result of the presence of formalin in it, it also causes difficulty in breathing and may lead to bleeding.

eye irritation 

Another side effect of keratin hair treatment is sensitivity that may occur. And some may suffer from a rash or itching, and others may suffer from irritation in the eyes, and it is very important to go to a well-ventilated salon.

weak hair 

After doing a keratin treatment and repeating it leads to weak hair.

Damaged hair 

Keratin causes damage that does not appear until after a period of 5 months, after which it begins to appear unkempt and weak and the ends are brittle.

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