Edamame and Cayenne If edamame could speak, they would say to cayenne: ???You complete me.??? Scientists in Korea discovered that the tag team of genistein, an isoflavone antioxidant found in soy foods such as edamame and tofu, and capsaicin, the antioxidant that gives chili peppers their fiery kick, can help tame inflammation (Hwang et al. 2009).