The chemicals in Acacia rigidula might have stimulant effects, which is why it is used in some weight loss and athletic performance supplements. Many dietary supplements that list Acacia rigidula as an ingredient have been shown to contain large amounts of the chemical phenethylamine. Many of these supplements have also been found to contain another unlisted ingredient called beta-methylphenethylamine (BMPEA). This ingredient is a stimulant similar to amphetamine.
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