Ahead, the best keratin shampoos for smoothing frizz, repairing damage, and strengthening your hair according to editor testing and stylist recommendations.

A moisturizing shampoo that’s sulfate-free is the best shampoo for keratin-treated hair, Carolyn Aronson, a professional hairstylist and CEO/founder of It’s A 10 Haircare, tells Elite Daily.

Pre-treatment For the best results, your hair and scalp need to be clean before undergoing a keratin treatment. Any residue from other products may hamper the treatment’s effectiveness. You can ...

If you have thinning hair that's also brittle, bonding treatments like this shampoo can really come in handy: The formula strengthens and repairs hair while adding moisture and nourishment.

Read the list of the 5 keratin shampoos that change your hair, giving them silkiness, shine, and body. Discover our top recommendations for better and easier hair care.

RELATED: The guide to hair salon etiquette, including how much to tip "Any time someone says a treatment only works with their shampoo or conditioner, I'd be wary," says Emma Froelich, vice ...

This leaves hair thin, brittle, dull, and prone to further damage. “By the time we’re in our 30s, the natural levels of keratin in our hair have significantly diminished,” MJ explains.