Why? Because keratin treatments are great at amping up shine, smoothing the hair cuticle and generally giving you salon-worthy manageability, for months on end. Need to know more? We’ve got all ...

Meanwhile, Kara Jillian Brown—who has tight, 4B-4C coils—opted for a keratin treatment with formaldehyde (more on this ingredient later). For further insight into this popular hair treatment ...

Collagen supports hair structure and scalp health, while keratin repairs hair strands and enhances hair smoothness and shine.

Over 36,000 five-star fans praise this revitalizing formula that's packed with strand-boosters like jojoba, peppermint and ...

It uses keratin and pig collagen to tackle dry ... a second even though I'm not halfway through the first bottle." "I have very long hair so the only con is that the bottle is quite small and ...