Potential actions of phytochemicals, particularly trans-resveratrol, EGCG, curcumin, and quercetin on obesity and its comorbidities. Abbreviations: EGCG, epigallocatechin gallate; MCP-1, monocyte chemotactic proteins-1; LDL, low-density lipoprotein; COX-2, cyclooxygenase-2; iNOS, inducible nitric oxide synthase; TNFα, Tumor Necrosis Factor; Nrf2, nuclear factor erythroid-2-related factor 2; PPAR-β, peroxisome proliferator-activated receptor-β. (+): Stimulate; (−): Inhibit.