Jock itch rash is caused by lead in the Lymph system of the body. L- methionine, an amino acid will chelate it from the body and alleviate the rash. You need 2,000 mgs. Methionine
a day for 3 weeks, then 1,000 for 3 weeks and finally 500 for
2 weeks then you are finished and do not need anymore.
Not all brands are potent, therefore I'll mention a few I know are, Twin Labs, Solgar, & Country Life. I have no affiliation with these companies.