Related by context. Frequent words. (Click for all words.) 74 chemical dopamine 73 neurotransmitter dopamine 70 chemical serotonin 69 dopamine 68 Dopamine 66 chemical messengers 64 neurotransmitter 64 neurotransmitters 62 hormone insulin 61 noradrenaline 61 serotonin 61 acetylcholine 60 glutamate 60 Ghrelin 59 orexin 59 norepinephrine 58 hormone leptin 58 vasopressin 58 nitric oxide NO 58 brain derived neurotrophic 58 insulin hormone 57 Nitric oxide 57 thyroid hormones 57 inflammatory cytokines 57 nerve impulses 57 dopamine neurons 57 Serotonin 56 Leptin 56 skeletal muscles 56 nitric oxide 56 Cortisol 55 nerve cells 55 stress hormones 55 neuronal activity 55 endorphins 55 neurochemical 55 signaling molecule 55 vasodilation 55 dopaminergic 54 Nrf2 54 dopamine receptors 54 Oxytocin 54 heme 54 thyroid hormone 54 GABA 54 insulin secretion 54 neurones 54 signaling molecules 53 prostaglandins 53 arachidonic acid 53 excitatory 53 stress hormone cortisol 53 aldosterone 53 leptin 53 MeCP2 53 estrogen hormone 53 inflammatory mediators 53 synaptic plasticity 53 NMDA receptors 52 dysregulation 52 prolactin 52 clot formation 52 pro inflammatory cytokines 52 glucocorticoid 52 naturally occurring hormone 52 midbrain 52 PPAR gamma 51 endorphin 51 cortisol 51 neurons 51 BDNF 51 biochemical reactions 51 hypothalamus 51 naturally occurring protein 51 vagus nerve 51 cAMP 51 vasodilator 51 secretion 51 hormone 51 endocytosis 51 motor neurons 51 SIRT1 51 osteocalcin 51 signaling pathway 51 insulin 51 dopamine producing 50 female hormone estrogen 50 AMPK 50 interferon gamma 50 lysosomes 50 cytokines 50 melatonin 50 digestive enzymes 50 bile acids 50 steroid hormones 50 histamine 50 NPY 50 mitochondrial function 50 adenosine 50 mental alertness 50 pancreatic beta