you can use other mints. Cornmint has the same effect for lowering testosterone. but be careful of some mints' toxicity. Pennyroyal can be deadly with 1 tablespoon of extract. Other mints have way less of that harmful chemical. Peppermint and pennyroyal listed here http://www.nlm.nih.gov/medlineplus/druginfo/herb_All.html#P I'll leave it to Lotus to answer more.