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. 2012 Jul 19;8:323–328. doi: 10.2147/NDT.S33259

Figure 2.

Figure 2

When an amino acid precursor of serotonin or dopamine is administered alone or in a manner that dominates the synthesis, metabolism, and/or transport of the other system, depletion may occur.12–15

Abbreviation: 5-HTP, 5-hydroxytryptophan.