In this review, studies (n = 41) were searched in which the compounds and contents were determined for whole fig fruit, peel, leaves and pulp, the types of fig-based products were identified and their total phenols and antioxidant capacity as well as the potential uses of different extracts of fig parts were analyzed. There is a need to reduce the fruit’s environmental impacts (zero waste), and bioactive compounds from fig fruits present a high added value as functional ingredients. Focusing on fig by-products (peel, seeds, no-optimal fruits and leaves), individual compounds and/or extracts can increase the functional, nutritional and techno-functional properties of food products such as additives. A high number of phenolic compounds was found in whole fruit (n = 19), peel (n = 26), pulp (n = 24) and leaves (n = 42). Quercetin-3-O-rutioside was reported as the major individual phenolic compound in whole figs, while cyanidin-3-rutinoside, epicatechin and caftaric acid were the highest compounds in peel, pulp and leaves, respectively. A potential strategy could be the development of novel additives and/or ingredients for food industry from fig by-products. Therefore, the use and valorization of the waste material produced during fig processing should be further investigated.
Sapindaceae (Dimocarpus longan and Nephelium lappaceum) seed and peel by-products: Potential sources for phenolic compounds and use as functional ingredients in food and health applications
