Keratin is great for taking frizz out of hair. But there is some Keratin that does have formaldehyde and even some hair straightening chemicals. So do your research before you get a treatment on the product used and look it up online and you can even call the distributor for questions if you feel you should. You want to know exactly what is put on your hair and if its for your type of hair. Also know the maintenance afterwards. Using a Keratin shampoo and conditioner is necessary and its best to use the same product line of the Keratin that was put on your hair.
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