Hydrate Fiber. Reduce Breakage.
Dry and damaged are not the same problem. The fix differs.
Tell Them Apart
Dry hair lacks water. It feels rough but stretches and returns. Damaged hair has lost cuticle and internal bonds. It snaps rather than stretches. Hydration fixes the first. Only structural repair helps the second.
The Mechanisms
Natural Moisturizing Factors are hygroscopic humectants that hold water in the fiber. Betaine binds water strongly and supports scalp comfort. Ceramides are lipid barrier components: they reinforce the barrier and seal moisture.
How to Treat It
Condition mid-lengths to ends to protect the cuticle and reduce friction. Use a mask to rebuild the fiber from within when hair snaps. Reduce heat and mechanical stress while the fiber recovers.