What is "Salt peter"?

Answers:
Salt Peter is "potassium nitrate (KNO3), more commonly employed as an ingredient in gunpowder, has no therapeutic value as an anaphrodisiac, contrary to legend... Still, when you look at what the stuff does do, you can see where the idea got started. Saltpeter can cause relaxation of involuntary muscle fiber (for which reason it's used to treat asthma) and it's occasionally prescribed to lower body temperature in cases of fever. From there it's not much of a leap to think that "niter," as it was called in the old days, might cure "sexual fever," and in fact a few doctors urged it for that purpose centuries ago."

Other Answers:
It is the common name for the chemical compound potassium nitrate.
AC is correct ... it was used in the armed forces to keep the men from getting erections ...

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