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

•A large quantity of by-products is produced from processing of Sapindaceae fruits.•These by-products are rich in gallic acid, ellagic acid, corilagin, and geraniin.•Phenolic compounds possess a wide range of beneficial properties.•Effective recovery and value-added utilization of natural phenolics are possible.