Reverse micelles ubiquitously assemble in the presence of water and amphiphilic substances in edible oils and are the primary locations for oxidation-related reactions. This study revealed the role of reverse micelles in controlling the efficiencies of epigallocatechin gallate (EGCG) and epigallocatechin (EGC) in suppressing the heating-induced deterioration of camellia oil. Using hydroperoxides, conjugated dienes, and carbonylic compounds, we determined that reverse micelles could dually regulate the efficiencies of EGCG and EGC in suppressing the degradation of camellia oil. In particular, r...