If it’s thick, lush hair you seek (same), you’re in the right place. ALTERNA HAIR Clinical Densifying Leave-In Root Treatment is a daily hair-stimulating treatment that helps with scalp health, giving fine hair the best chance to thrive. Think of it as a vitamin for your hair – and in fact, it’s packed with them. This daily treatment is formulated to improve hair texture and overall condition, as well as to boost volume and thickness.