Gengigel Gel is a biological mouth and gum care gel based on hyaluronic acid which is found naturally in the oral tissues. Gengigel Gel is a biological mouth and gum care gel based on hyaluronic acid which is found naturally in the oral tissues. Gengigel provides active protection from gum disease and support for the natural healing of inflamed and damaged tissue in the mouth. Gum disease treatment recommended by hygienists.