| gastrointestinal tract | 0.58 |
| the brain | 0.58 |
| platelet | 0.55 |
| the gut | 0.52 |
| central nervous system | 0.51 |
| plant | 0.40 |
| blood platelets | 0.40 |
| the body | 0.38 |
| fungus | 0.32 |
| banana | 0.30 |
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| regulate mood | 0.63 |
| regulate sleep | 0.63 |
| regulate appetite | 0.63 |
| affect mood | 0.60 |
| regulate memory | 0.59 |
| act in the brain | 0.55 |
| help regulate mood | 0.55 |
| affect sleep | 0.55 |
| help regulate appetite | 0.51 |
| improve mood | 0.51 |
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| effect | 0.45 |
| muscle contraction | 0.37 |
| various functions | 0.33 |
| endocrine regulation | 0.30 |
| hand | 0.29 |
| calming effect | 0.28 |
| short half-life | 0.16 |
| neurotransmitter | 0.79 |
| important neurotransmit… | 0.53 |
| a monoamine neurotransm… | 0.43 |
| inhibitory neurotransmi… | 0.37 |
| the amino acid tryptoph… | 0.49 |
| 5-htp | 0.45 |
| protein | 0.33 |
| norepinephrine | 0.33 |
| dopamine | 0.30 |
| 5 hydroxytryptophan | 0.27 |
| tyrosine | 0.27 |
| involved in mood | 0.64 |
| involved in sleep | 0.63 |
| produced in the body | 0.61 |
| produced | 0.59 |
| produced in the gut | 0.57 |
| involved in aggression | 0.56 |
| converted into melatonin | 0.56 |
| involved in depression | 0.56 |
| released | 0.54 |
| produced in the brain | 0.52 |
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| impulse control | 0.36 |