Aunt Jackie’s Growth Oil Balance Grapeseed & Avocado Growth Oil 4 ozPorosity involves your hairs 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 doesnt absorb products easily). Aunt Jackies Balance! Grapeseed & Avocado therapy is a great solution to help balance your porosity level.