Which phytonutrients are known to have hormetic influences on mitochondrial function? Resveratrol from grape skins and peanuts, epigallocatechin gallate (EGCG) from green tea, curcumin from turmeric, isohumulones from hops, quercetin from buckwheat, watercress, and dill all work—optimally, when found in whole, minimally processed foods and supplements.