In the Blue Zone of Okinawa, Japan, locals drink green tea with jasmine flowers and turmeric called shan-pien, which translates to "tea with a bit of scent." David McLain/Courtesy of Blue Zones hide caption

itoggle caption David McLain/Courtesy of Blue Zones

Smoke and mirrors: Dave Arnold plays around with liquid nitrogen in a cocktail glass during his interview with NPR's Ari Shapiro. Claire Eggers/NPR hide caption

itoggle caption Claire Eggers/NPR

Dietary supplements are generally defined as vitamins, minerals, herbs and extracts. They're regulated as a unique category of food by the Food and Drug Administration. iStockphoto.com hide caption

itoggle caption iStockphoto.com