Lifestyle Food Kourtney Kardashian Reveals the Caffeinated Drink She Swears By: 'It Makes My Tummy Flatter!' Nope, it's not coffee. By Liam Berry Published on July 24, 2017 04:50 PM Share Tweet Pin Email Photo: AKM-GSI It’s no secret that the Kardashian family has a few tricks up their sleeves when it comes to beauty, but Kourtney might have just revealed one of the most surprising yet: Put down the cold brew and pick up some green tea. As a member of one of America’s busiest families, you would think that Kardashian would need every ounce of caffeine she could get just to keep up—but in one of her latest posts on her app, the eldest Kardashian made it clear that she dropped coffee a long time ago. “First off, I’m allergic to coffee—it makes me insane! I get really hyper and really on edge when I drink it, so I stopped drinking it when I was 21 or 22,” Kardashian wrote. Khloé Kardashian Credits Her Flat Stomach to These 5 Foods Ever since then, Kardashian continued, green tea has been her “go-to.” And it wasn’t just her mood that changed when she swapped out coffee, she also noticed some positive changes to her fitness. “I swear it makes my tummy flatter! Also, green tea can help reduce the signs of cellulite.” FROM PEN: Feed Your Friends Butterburgers and Grilled Guacamole on Game Day Kourtney says she usually has “hot green tea late in the late morning or early noon,” adding that her favorite is “a cup with honey and a little splash of almond milk—that’s my thing at a restaurant.” Want the ultimate dish on the latest celebrity food news, plus exclusive recipes, videos and more? Click here to subscribe to the People Food newsletter. Kardashian attributes the benefits to green tea’s tendency to deliver caffeine “much slower than with espresso or coffee, so it lasts longer.” If you’re looking for that same caffeine boost before a workout, Kardashian recommends drinking “an extra iced green tea.” Put your celeb and pop culture knowledge to the test and download PEOPLE and Zynga’s Crosswords with Friends!