r/HaircareScience • u/KpStick • Aug 07 '25

Discussion Do straightening shampoo/conditioners actually work?

A brand of shampoo I really like released a new line that promises to make the hair straighter and more aligned. Could that work to make wavy hair straighter or does it only work on already straight hair? I'm not sure how that would work...

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u/Designer-Cap27 22d ago

For me, They don’t actually straighten your hair, but they can make it look smoother and less frizzy. Basically just help prep your hair so it stays straighter if you blow dry or flat iron.