Capsaicin The fruit of most species of Capsicum contains capsaicin -LRB- methyl vanillyl nonenamide -RRB- , a lipophilic chemical that can produce a strong burning sensation in the mouth of the unaccustomed eater .

Capsaicin The fruit of most species of Capsicum contains capsaicin . Capsaicin is a chemical that can produce a strong burning sensation in the mouth -LRB- and , if not properly digested , anus -RRB- of the unaccustomed eater .
