dopamine, serotonin, phenylethylamine, neurotransmitters, oxytocin, cortisol, adrenaline, noradrenaline, adrenalin, hormones, norepinephrine, adenosine, pheromones, lactic acid, histamine, parasympathetic nervous system, beta endorphin, acetylcholine, nitric oxide, prolactin, corticosterone, vasopressin, relaxant, tryptophan, sebum, thermogenesis, sebaceous glands, cytokines, glutamate, arousal, metabolism, sexual arousal, libido, caffeine, melatonin, prostaglandins, catecholamine, adrenal cortex, testosterone, estrogen, adrenocorticotropic hormone, vagus nerve, monoamine, depressant, gamma aminobutyric acid, adrenals, ketones, ghrelin, thyroid hormone, hypothalamus, citrulline, muscles, cholecystokinin, theobromine, satiety, lactate, pineal gland, thermogenic, secretion, luteinizing hormone, excitatory, neurotransmission, vasoconstriction, nicotine, peristalsis, toxins, glutamine, kundalini, cravings, alertness, mitogen, synapses, salicylic acid, vibrational, alkaloid, catalase, antidiuretic hormone, vasodilator, osmotic pressure, humectant, vasodilation, bloodstream, oestrogen, stimulation, stimulant, anabolism, capsaicin, lipolysis, glycogen, physical exertion, glands, autonomic nervous system, grogginess, alkalizing, sensory neuron, potentiation, eicosanoids, orgasm, ketosis, digestion, aerobic exercise, sensations, neuropeptides, neurotransmitter, androgens, glucocorticoids, analgesics, catecholamines, globulins, gonadotropin, androgen, antioxidants, glycosides, interferon, narcotics, opiates