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L-Tryptophan
A supplement providing L-tryptophan, an essential amino acid found in protein-rich foods; in the body it is a precursor to serotonin and to niacin (vitamin B3), and it is also the precursor to 5-HTP. Taken as capsules or tablets.
Often discussed in relation to
Worth knowing
L-tryptophan acts on serotonin pathways and may interact with antidepressant medicines (such as SSRIs) and other serotonergic medicines. A contaminated batch was historically linked to eosinophilia-myalgia syndrome, so product quality matters; talk with a clinician before use.
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