Underutilized fruits in Sri Lanka have been in a great deal of demand to utilize sustainably. It is observed that knowledge of the medicinal value and nutraceutical properties of Sri Lankan wild fruits is either lacking or poorly being disseminated within the community. Therefore, identifying health-promoting aspects of some underutilized fruits while screening their medicinal properties will be considered in this study. In order to do that, priority will be given to evaluating the pharmacological activity of some selected Sri Lankan wild fruits, especially focusing on edible parts and seeds. Thus, screening bioactivities e.g., antioxidant, anti-diabetic, and anticancer activity of some selected wild fruit/s and their parts will be carried out according to research protocols and procedures. Consequently, the best candidate will be chosen for in vitro, in vivo, toxicity, and clinical assessment in order to confirm the potency and attempts will be made to formulate a nutraceutical product that could have gained value addition, health-promoting, and well-being. Therefore, at the same time, our next goal would be disseminating the findings of new knowledge and technological know-how of the applications to the public.