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While the chemical spectrum of Eurycoma longifolia Jack (tongkat ali) is well documented in the scientific literature, the scientific studies into the sexuality-enhancing and testosterone-raising effects of the roots of this plant have not been conducted with specific active components (such as eurycomanone or eurycomalactone) but with whole tongkat ali extract, that was not standardized for any single specific active ingredient.
Last updated: December 23, 2011