“…Active compounds can be obtained directly from plenty of natural sources, such as propolis, mint, thyme, rosemary, cinnamon, boldo-do-chile, guarana, murta, grape, and pomegranate, to mention just a few of them. Such biologically active compounds can be extracted by means of organic solvents extractions (e.g., water, ethanol, and methanol) [ 118 ], membrane processes [ 119 ], among other emerging extraction technologies (e.g., high-voltage electrical discharges, microwave-assisted extraction, ultrasound-assisted extraction, and pulsed ohmic heating) [ 120 ]. Once the active compounds have been successfully extracted, their importance relies on their potential antioxidant activity together with inhibitory effect against bacteria and fungi [ 121 ], especially phenolic compounds (e.g., catechin, rutin, kaempferol, and chlorogenic, caffeic, and ferulic acids) [ 122 ].…”