As the world is looking for high life expectancy, a new shocking form of diabetes, that is, Type 3 Diabetes which has recently come into picture, has become a major issue. In short, Type 3 is diabetes in brain leading to Alzheimer's disease, a main cause of death among elderly. This book focuses on the best fit model to induce Type 3 Diabetes in Wistar rats. It also focuses on suitable extraction method, solvent and time to obtain maximum phytochemical constituents with high efficacy from both leaves and twigs of Camellia sinensis. A comparative study was also carried on Citrus reticulata...