Peptides are short chains of amino acids — the exact building blocks your hair is made from. When damage snaps those chains, peptides slot in and bridge the break.

Your hair is mostly keratin — a protein held together by thousands of tiny bonds. Bleach, heat and daily friction snap those bonds one by one.

Once enough break, the strand loses its stretch. It stops bouncing back and starts snapping instead, which is what breakage and split ends actually are.

A whole protein molecule is far too big to pass through the cuticle — it just sits on the surface and rinses off. That's why 'protein masks' can feel great for a day and do nothing lasting.

Hydrolyzed peptides are that same protein chopped down small enough to reach the cortex, where the broken bonds are. They reinforce from the inside, so the strength stays after you rinse.

Every Get Glazy capsule carries peptides for exactly this reason. Work one through damp lengths and they travel to the weak points and hold them together.