These huge spider's legs can span almost 6 inches (15 cm)
Besides intense pain and possible deadly medical complications, this Brazilian Wandering Spider bite can deliver a long and painful erection in men. This is because the venom boosts the Nitric Oxide (NO) levels in the blood, which dilates arteries increasing blood flow. Scientists are studying the venom for a possible new drug for erectile dysfunction.
Our bodies release NO into our arteries with every heartbeat to cause dilation of our arteries so our blood can flow. Many body builders take supplements to increase their NO levels.
Our main source of NO in supplements and in our diet is the amino acid, L-arginine, one of the building blocks of all protein. It is common for people with high blood pressure, peripheral artery disease PAD, clogged arteries, etc. to have a deficiency in NO. (Don't confuse NO with laughing gas, Nitrous Oxide (N2O) nor with Nitrogen Dioxide (NO2) a toxic air pollutant.
The source of the picture is wikipedia. (that's not my arm in the picture)
More info about this spider:
https://en.wikipedia.org/wiki/Phoneutria
https://www.livescience.com/41591-brazilian-wandering-spiders.html
More info about NO:
https://en.wikipedia.org/wiki/Biological_functions_of_nitric_oxide
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