Hidden ingredients are increasingly becoming a problem in products promoted for sexual enhancement. The researchers identified top-selling male sexual-help supplements and analyzed the ingredients, including those in products marketed to enhance erections, desire and sexual performance. Many men seeking medical help for sexual health issues report using dietary supplements. But with little regulation of dosage or ingredients, the health effects of these products are unknown, the researchers said in background notes. It's ironic that the male preoccupation with enhancement seems to be independent of the needs of women, the supposed benefactors of improved sexual performance.