Abiotic stress, Auxin-like effects, Biotic stress, Melatonin, Photoprotection, Seeds, Bile, Cerebellum, Gastrointestinal tract, Membranes, Skin, Cerebrospinal fluid, Extrapineal, Melatonin, Receptor overexpression, Receptor polymorphism, Carbonate radical, Ischemia, Mitochondria, Peroxynitrite, Tyrosine, Nitration, AMK, Inflammation, NO synthases, Posttranslational modification, RNS, ROS, Bipolar disorder, Circadian, Depression, Melatonergic drugs, Melatonin, Phototherapy, Seasonal affective disorder, Agomelatine, Berberine, Indoles, Ramelteon, Redox cycling, Tasimelteon, Inflammaging, Inflammation, Insulin Resistance, Melatonin, Type 2 Diabetes, Cannabinoid receptor, EGFR, Melatonin receptor MT1, Mitochondria, Multimeric receptors, Steroid receptors, Circular RNA, Disease spreading, Ectosome, Exosome, Inflammation, lncRNA, MicroRNA