Give your hair spa-level treatment at home. The powerful formula of this mask boosts hair growth and repairs severely damaged strands. Keratin makes hair more manageable and reduces frizz. Biotin stimulates growth and protects against breakage. Coconut oil decreases hair loss and hydrates broken strands. Marine collagen makes locks thicker and softer. Use 2-3 times a week, avoiding your scalp and hair roots, for the best results.