A team of researchers from the University of Limerick of Ireland found that ordinary tears, saliva, egg white and cow’s milk can produce piezoelectricity. The active substance here is lysozyme. In productivity, lysozyme competing with traditional quartz is capable of producing electric force when changing shape. This effect is used everywhere today, but the role of electricians for gadgets and devices of much greater power is played by piezoceramic elements, which include not the safest lead and barium. At the same time, lysozine is a biocompatible material from which you can make anything you like, including coatings for medical implants for various purposes and flexible electronics that are in demand in healthcare. Isolation of the substance is publicly available and is relatively inexpensive. Scientists hope that their development will find wide application, since it is easy and inexpensive to get lysozyme crystals from organics.