? Boesenbergia rotunda (fingerroot)
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Boesenbergia rotunda (fingerroot)

Krachai has numerous health benefits, many related to immunity against infections. It has a long history as food ingredient, which means that humans are well adapted to its ingestion.

Fingerroot's sexual applications is what is of interest to us here. Fingerroot is a potent phosphodiesterase inhibitor, albeit of a low affinity. Sildenafil, the active ingredient in Viagra, is also a phosphodiesterase inhibitor.

Phosphodiesterase inhibitors cause and prolong erections, this is well-known.