
K18
Leave-In Molecular Repair Hair Mask
A four-minute, no-rinse peptide treatment with a strong following among bleached hair, priced as one of the costliest repair steps.
Hair & Scalp · Repair
5 products we review are built for split ends — 60% of them treatments. The ingredients doing most of the work: biotin, bond builders and panthenol. Most are made for curly hair, color-treated hair and damaged hair.
Repair, shape, shine and scalp care for straight, wavy, curly and coily hair.
Top rated
The ingredients behind it
Key actives in the products that deliver split ends — tap one for what it does and how strong the evidence is.
Often paired with
Benefits that tend to come along for the ride.
5 products
5 products

K18
A four-minute, no-rinse peptide treatment with a strong following among bleached hair, priced as one of the costliest repair steps.

Moroccanoil
The original argan-infused silicone hair oil: reliably smoothing, shiny and versatile, with a signature scent and a premium price.

Redken
A sulfate-free, low-pH repair shampoo that colorists rate for softness on damaged hair, best used with the rest of the line.

Olaplex
A gentle, bond-building daily shampoo that suits damaged and color-treated hair, priced well above most rivals.

Mielle
The $10 viral rosemary scalp oil: a cheap, multi-use scalp and ends oil whose hair-growth reputation rests mostly on anecdotes.