Protouch Biotin & Collagen Hair Growth Drop is clinically tested & an ultra-concentrated formula aimed at boosting hair growth, quality, shine, volume & overall health. Its unique blend of Biotin and Collagen works together to give a healthy, lustrous, & voluminous mane that is beautiful inside-out. Its non-sticky and a quick-absorbing formula enriched with vital nutrients & essential ingredients make your hair and scalp healthy. It strengthens your hair follicles, nourishes your hair & rejuvenates your scalp, giving you 10X Stronger, Longer & Thicker Hair.