Coffee silverskin extract for aging and chronic diseases

Coffee silverskin (CS) is the by-product generated when roasting coffee, which is very abundant worldwide. Its potential as a functional food ingredient was for the first time proposed at the beginning of 2000. However, to the best of our knowledge its use as a functional food ingredient is not commercially available. Initially, CS was proposed as a natural source of prebiotic or dietary fiber. Recently, novel information regarding the chemical composition and innovative applications of this particular food matrix and its derivatives has been reported. In the last decade the valorization of food wastes has become a priority research line in order to achieve a sustainable world and a better future for Earth. On the other hand, it is mandatory to find natural and sustainable strategies to either reduce the risk or treat chronic diseases, especially those related to demographic changes such aging of the population and those considered epidemics of the XXI century (obesity and diabetes). The present chapter provides some insights on the extraction process, chemical composition and health promoting properties of aqueous coffee silverskin extract (CSE). The health promoting properties of CSE are attributed to its powerful antioxidant character. Therefore, CSE can be used to prevent or treat age related chronic diseases caused by oxidation and inflammation. The chapter pretends to demonstrate how bioeconomy may be helpful to achieve an environmentally clean and healthy world; as well as, to pin-point the valorization of by-products into functional food ingredients as a good strategy for the future. In conclusion, the data presented in the chapter support that coffee can be a sustainable industry and a source of several multifunctional bioproducts of interest for human health.This research was supported by the NATURAGE (AGL2010-17779) and SUSCOFFEE (AGL2014-57239-R) projects. Fernandez-Gomez, B. (BES-2011-046827) and Iriondo-DeHond, A. (BES-2015-072191), thanks the Spanish Ministry of Economy and Competitiveness (MINECO) for their pre-doctoral research fellowship (FPI) and Martinez-Saez, N. thanks the Autonomous University of Madrid (U.A.M) for her FPI-predoc fellow.Peer reviewe