Thankfully, the mum-of-three has shared one of her health and fitness secrets on her app, revealing the product that helps her maintain her flat stomach.
"Since I've stopped drinking coffee, green tea has been my go-to," Kourtney says. "I'll usually have a hot green tea in the late morning or early afternoon—even if it's hot outside."
She even uses it as a pre-workout.
"Whenever I am trying to step up my workout regimen, I drink an extra iced green tea. I swear it makes my tummy flatter," she adds. "Also, green tea can help reduce the signs of cellulite."
While she’s certainly no medical professional, she has highlighted some of the touted benefits of the bev.
"The caffeine in green tea and matcha is delivered into your bloodstream much slower than with espresso or coffee, so it lasts longer, and I don't get jitters that come along with a coffee high," Kardashian says. "Also, green tea contains tons of natural antioxidants and anti-inflammatory properties that are said to prevent everything from premature ageing to cancer."
And the best part? It's affordable. You could pick up a 20 pack of Twinnings green tea from Woolworths for only $1.60.