Asked by MarianneG
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Professional products like wella and loreal would be fine to use after a keratin treatment, however, Myself and my team would not recommend you to use henna so soon after this treatment as some henna contains metalic salts which would possibley react with the treatment that is on your hair, this could cause damage to the hair.
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The Team at MatthewDavid Bespoke Hairdressing
I totaly agree any chemical processr should be undertaken by a fully qualified stylist who is using manufactures guidlines and a welth of experience . As healthy as henna sounds metalic salts are found in many of these product .
I have a customer that has the brazilian blow dry and she uses henna on her hair without any problems.
If you are unsure you could always test a small part of your hair first.
It is always best to colour your hair just before the treatment as it will seal in the colour.
Both henna and keratin are natural so in theory there shouldn't be a problem.