Until now, it has been difficult to use hyaluronic acid in products that are rinsed off because it does not stay on the skin after rinsing. This is because the surface of the skin is negatively charged, while hyaluronic acid is neutral. To ensure that the hyaluronic acid stays on the skin after rinsing, it would have to be positively charged. For our Cleansing Gel, we use an advanced modification of hyaluronic acid that is positively charged and has been proven to stick to the skin up to 95%, even after it has been rinsed off.