FDA is warning people NOT to use supplements containing L-5-hydroxytryptophan (PhenCal, Thin-Thin, etc.)

The FDA is warning people NOT to use supplements containingL-5-hydroxytryptophan (PhenCal, Thin-Thin, etc).

L-5-hydroxytryptophan is a metabolite of L-tryptophan.

These amino acids are used to increase serotonin production.People take them for weight loss...depression...anxiety, etc.

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