Alterna Caviar Anti-Aging Clinical Densifying Leave-In Scalp Treatment Thickens Thinning Hair 4.2 Ounce Alterna Caviar Anti-Aging Densifying Clinical Leave-In Root Treatment is a daily blend that helps stimulate denser-looking hair with an energizing mix of vitamins and nutrients. It creates a defense against excess build-up and other residues. This formula is infused with Alterna's signature Caviar Extract and Red Clover Densifying Complex to give the appearance of fuller hair. The regimen is clinically proven to provide significant improvements in hair texture, thickness, and overall condition with regular use vs. untreated hair.