Maybe it’s no coincidence that kaempferia parviflora is a plant with a very limited geographic reservoir. It is found only in Thailand, quite possibly the sexiest country in the world.

Thai cuisine uses rhizomes more than any other the cuisine of any other country. Rhizomes like ginger, tumeric, galangal give an authentic taste to most Thai dishes.

Kaempferia parviflora is a rhizome, and extremely rare in the wild. And we do mean “extremely”. Would this rhizome plant not have been cultivated in Thailand as a medicinal plant, it would probably long have been extinct.

The name of the plant, kaempferia, suggests some connection to martial arts, and a German-speaking botanist in naming it. Kaempfer is German for Fighter.

And indeed, one could not find a kickboxing camp in Thailand where krachai dam (kaempferia parviflora) wouldn’t be widely consumed.

Is there scientific evidence? Of course, there is.

Kaempferia parviflora is a phosphodiesterase inhibitor, not just of phosphodiesterase class 5 like sildenafil, tadalafil, and vardenafil, but also of class 6 phosphodiesterase.

Phosphodiesterase acts on blood vessels, inhibiting constriction. For the penis, this causes an erection. And for the kickboxer, it causes an increased blood supply to about every muscle of the body. Obviously, increased blood vessel diameter means increased blood supply, and increased blood supply means more oxygen for every muscle.

And this is exactly what trainers in Thai kickboxing camps promise. Every blood vessel fully saturated.​

Not that kickboxers only appreciate this physiological effect of kaempferia parviflora.

The herbal is not yet on the list of the World Anti-Doping Agency, so, as word spreads, expect some professional cyclists participating at the Tour de France to develop a marked preference for Thai cuisine. Or how about a Thai cycler riding down the Champs Ellysee in a yellow jersey.

And then there are bodybuilders who, in cutting cycles, just struggle to achieve just this for esthetic endeavors: relaxed blood vessels that show on the surface of the skin.

Clearly, kaempferia parviflora (krachai dam) has enormous potential.