Deep conditioning treatments—also often referred to as masks—usually fall into one of two categories: protein-based treatments and moisture-based treatments.
Protein-based deep conditionersstrengthen the hair, improve elasticity, and prevent breakage
Moisturizing deep conditionersbring moisture back into the hair
Deep conditioning treatments feature many benefits. They restore the hair’s natural shine and luster. They also moisturize the scalp, which reduces itching and flaking. Many deep conditioning treatments are designed for color- or chemically-treated hair, which has a tendency to become dry and dull. For many women, deep conditioning treatments provide the ideal solution for frizzy, lifeless tresses by enhancing body and adding softness and shine.
A Leave-in conditioner is an added step after washing and conditioning hair. Much like the conditioner you use in the shower, it offers a level of detangling, moisturizing, and heat-protecting properties. Unlike the conditioner you use in the shower, a leave-in conditioner isn't mean to be rinsed out of the hair.