Living Proof Scalp Care Density Serum 1.7oz. Living Proof Scalp Care Density Serum 1.7oz. A scalp serum formulated to minimize the appearance of grey hair, reduce shedding, increase hair density, and promote hair growth in as little as 90 days. Reduces the appearance of grey hair Clinically proven to visibly reduce hair thinning Promotes healthier hair growth. Cruelty-free. Promotes thicker, fuller, healthier-looking hair from the root. Formulated without parabens, sulfates, and phthalates. 1.7 oz. Start by applying 2-3 dropperfuls directly to dry or damp scalp.. Massage in. Do not rinse.. LPRO-WU21. 103477.