Quit using keratin. What will happen over a very long time of using extensions is that the hair will grow thinner. I know this guy who was a Rock & Roll dude and now older and his skin is about 1/2 thick of dry flaky skin.
IDK what kind of hair you have but after chlorine pool I wash hair,condition and then use Matrix conditioning balm Continuous moisture for Dry stressed hair, while still wet and LEAVE IT IN.
The more stuff you do to your hair the worse it gets, but conditioners can always use. Look up keratin long term side effects.
Bottom line: At this point, there is no effective salon-performed, keratin-based hair-smoothing product that can be considered completely safe, according to Dr. McMichael. If you have been receiving keratin treatments, it’s time to give serious consideration to stopping. Even if you have not noticed any negative effects as yet, it doesn’t mean that you’re immune—cumulative exposure only increases your risk.