Protein / Amino Acid

Hydrolyzed Keratin

also on labels as Keratin Amino Acids · Soluble Keratin

Hair-identical structural protein broken into smaller peptides that bind to damaged cuticle sites, temporarily improving tensile strength, elasticity, and breakage resistance.

protein Good to know Hair types

How it's writtenOn a label, look for

Hydrolyzed Keratin
Keratin Amino Acids
Soluble Keratin

We haven't read a label with it yet.We've read 34 so far.

Good to know

Stronger film-forming/reconstructing feel than amino acids; overuse on low-porosity or protein-sensitive hair can cause stiffness.

Hair types

Notes for different hair

High-porosity, bleached, relaxed, or heat-damaged coils needing structural reinforcement.

General patterns from our research, not rules. Hair of the same type can respond differently, so your own results count most.

Also protein

Other ingredients like it

Source: The Good Coil research · Ref ING-052Get this as data (JSON)How we write these