Vital power! - Theahuhu COFFEIN Thickening Tonic (100 ml) -The revitalizing tonic is the ideal complement to the COFFEIN Thickening Shampoo. Strengthening and strengthening active ingredients such as caffeine and maca root extract strengthen the hair directly from the root. In addition, rice starch settles around the hair like an invisible scaffold, giving it support, making it more grippy and fuller.