As for insect bars, they're made with cricket flour-created by roasting insects in the oven then grounding them into a powder. Sounds gross, yet insects are eaten by as much as 80 percent of the world's population and are a nutritional superstar, according to a report from the United Nations Food and Agricultural Organization. It's also the most sustainable protein source on the planet: Insects are 20 times more efficient as a source of protein than cattle, produce 80 percent less methane, and need 6 times less feed than cattle to produce the same amount of protein, per Exo Bars. Exo Bars' bug-infused products were created by a three-Michelin-starred chef and include four flavors: Apple Cinnamon, PB&J, Blueberry Vanilla and Cacao Nut. Chapul, the original cricket bar, offers three varieties: spicy cocoa, peanut butter and chocolate, and a Thai-inspired bar made with coconut, ginger, and lime.