L'ANZA Healing Volume Thickening Shampoo provides exceptional body and fullness for fine and thin hair. This sulfate-free shampoo is extra gentle on the hair's structure whilst the thickening formula, containing natural Gugo Bark, provides rich, abundant lather resulting in noticeably thicker hair. L'ANZA researchers have thoroughly studied the effects of L'ANZA Healing Volume Thickening Shampoo. The astounding benefits of organic Bamboo, to boost hair's volume, combined with L'ANZA's exclusive Keratin Healing System with Nano Science delivers Bamboo's abundant Silica deep into the cortex. Laboratory results have shown that hair initially 55 microns in diameter is thickened to 85 microns in diameter when using products within the L'ANZA Healing Volume routine. Lightweight Silica bonds to hair's cortical wall to boost fiber rigidity & volume, while it plumps hair from the inside-out. The result is noticeably thicker, fuller hair. Free of sulfates, parabens, gluten & sodium chloride. *Please note, L'ANZA are currently updating their product packaging to give it a fresh, new look. Packaging of this product is subject to variation from the visual shown.