Aunt Jackies Balance With Grapeseed And Avocado Oil porosity involves your hairs ability to absorb moisture. Issues like breakage and 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 doesnt absorb products easily). Aunt Jackies Balance Grapeseed and Avocado therapy is a great solution to help balance your porosity level. Also try it as a pre-poo (pre-shampoo) to improve tensile strength.