I have noticed alot of straightening products(serums and creams), shampoos and conditioners w/ this CHEMICAL in it...Even though it is at the end of the ingredient list your skin is still absorbing it...your skin is the largest organ on your body and absorb WAY more nutrients quicker and at a faster rate than orally!....Just like if you stay in the sun long enough it will eventually cause harm...It 's effects may take a while Sodium Hydroxide is not ment to
stay on the hair...Companies kill me w/ there
cheap way of creating hair products...especially Black hair products...if they need to lower ph or blend or break down or even emulsify there are PLENTY of NATURAL ingredients that can do the job...and do it way better!...it still is a chemical....Altough I am relaxed that is the only time that I am putting an Harsh Chemical on my hair. Personally I will not buy a product that contains that ingredient and then
leave it on my hair or use it as a deep conditioner ( so it can further seep in my scalp),for staightening or for a co-wash...I am running away from that chemical as much as I can!
That is just my HO.
But to each is own..