Aunt Jackie's growth Oil Grape Seed & Avocado, porosity involves your hair's ability to absorb moisture. Issues like breakage & damage, or limp, lifeless hair can occur when porosity levels are too high (your hair absorbs products, but quickly becomes dry again), or too low (your hair has lots of build up because it doesn't absorb products easily). Aunt Jackie's balance! Grapeseed & Avocado Therapy is a great solution to help balance your porosity level.