Formaldehyde is harmful to hair, nails and all health, and it can even cause cancer and that is why its use in cosmetic products has been banned since 2009 after intense scientific research that proved that the substance was harmful to health, even when used in small concentrations.
When straightening hair with formaldehyde, it can initially prove to be very effective, but after some time, formaldehyde makes the hair more porous, favoring its breakage and leaving the hair totally dull. Its use also increases the risk of developing cancer because it can change the way cells multiply. Therefore, whoever wants to straighten their hair should go to a good hairdresser, where the professional is qualified and experienced to ensure that the procedure has the expected result, without harming health.
Here are some alternatives on How to straighten your hair.
It is also important that the straightening product is suitable for your hair type. To straighten curly, very curly, afro-style hair, the ideal chemical substance is Sodium Hydroxide, which is an odorless product that can remain on the hair for up to 30 minutes and that needs to be touched at the root within approximately 6 months. Those who want to straighten curly hair, but not Afro, should opt for ammonia thioglycolate, and those with mixed hair with unclear curls and various hair growth directions should opt for Guanidine Hydroxide. All of them give good results and do not contain formaldehyde in their formula.
