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Comparison of L-5-hydroxytryptophan and L-5-hydroxytryptophan inosinate as agents for increasing brain serotonin formation in rats.
Fuller Rw, Snoddy Hd, Robertson Dw
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Abstract
The effects of L-5-hydroxytryptophan (L-5HTP) and L-5HTP inosinate injection on brain 5-hydroxyindoles in rats were compared. L-5HTP and L-5HTP inosinate caused indistinguishable dose-dependent increases in 5HTP and 5HIAA (5-hydroxyindoleacetic acid) but not serotonin concentrations in whole brain at 1 hr in rats. Our results do not substantiate a previous claim that L-5HTP inosinate is superior to L-5HTP itself in increasing brain serotonin formation.