Instead of using normal running water to wash my hair, they use a type of spring water containing dissolved carbon dioxide gas. This method has been utilised in medical care in ancient European cities where there were many natural carbonate springs. In recent years, the Japanese found this to not only have positive medical attributes but also extremely good for beauty. Carbonated spring water has a natural anti-aging effect and is 3 times more moisturising compare to usual tap waters. It allows the scalp to recover to its healthy state by promoting blood circulation, improve scalp skin problems and also removes any fats or oils that have harden at the hair root.