Question: is olaplex shampoo good for keratin treated hair?
Answer: Re: Keratin and Olaplex 3,4,5,6 - Keratin Treated hair. are safe to use after a Keratin treatment as they do not contain sodium chloride. Sodium Chloride is what you need to avoid as it quickly eats away at the Keratin. Sulfates have no effect on Keratin Treatments, though Olaplex 4/5 is sulfate Free.