Related by context. Frequent words. (Click for all words.) 59 serotonin 55 melatonin 54 amino acid 52 vitamin B6 52 caffeine 51 protein 51 carbohydrates 51 GABA 51 fructose 50 Melatonin 50 glutamate 49 cortisol 49 histamine 49 carbohydrate 49 adenosine 49 acetaldehyde 49 enzymes 49 neurotransmitters 49 ghrelin 49 arginine 49 Serotonin 48 dopamine 48 leptin 48 sugars 48 choline 48 endorphins 48 digestion 47 metabolism 47 vitamin B# 47 fatty acids 47 acetylcholine 47 quercetin 47 B vitamins 47 enzyme 47 neurotransmitter 46 eggnog 46 nitrite 46 digestive enzymes 46 insulin 46 BDNF 46 carbs 46 whey protein 46 amino acids 46 fatty acid 46 folate 46 prostaglandins 45 wheat germ 45 omega 3s 45 secretion 45 calcium 45 thyroid hormone 45 grapefruit juice 45 stress hormones 45 satiety 45 norepinephrine 45 glutathione 44 glucose 44 lactic acid 44 egg nog 44 vitamin C 44 sleeping pill 44 fats 44 vitamin C. 44 circadian rhythms 44 polyphenols 44 drowsy 43 lactose 43 prolactin 43 Vitamin C 43 endorphin 43 niacin 43 overeating 43 zolpidem 43 DHEA 43 proteins 43 dietary fat 43 glycogen 43 uric acid 43 flavanols 43 hormone 43 metabolic processes 43 stress hormone cortisol 43 anti oxidants 43 autophagy 43 vitamin D 43 plant sterols 43 glucocorticoids 43 antioxidants 43 protein synthesis 43 cytokines 43 essential fatty acids 43 resveratrol 43 starch 42 glucose metabolism 42 essential amino acids 42 metabolite 42 Omega 3s 42 nitric oxide 42 beta carotene 42 circadian rhythm 42 lactate