Kim and Kourtney Kardashian Collect Their Own Sweat to Find Out Who’s Healthier -- Watch! (Exclusive)


Kim and Kourtney Kardashian are taking Keeping Up With the Kardashians somewhere it’s never been before: the sauna.

ET has your exclusive first look at this week’s all-new episode, which finds Kim on a mission to prove to Kourtney that her ultra-healthy, gluten-free lifestyle isn’t actually benefiting her that much. To prove her point, Kim challenges Kourtney to a “sweat test,” alongside pal Jonathan Cheban. According to Kim, they can collect their own sweat in vials and have it sent off to a lab to be tested for various toxin levels.

“Gluten, with a sweat test?” Kourtney asks, skeptically. “I’ve never heard of it.”

“I’ve never heard of a ‘sweat test,’ and it just sounds gross,” she adds in a confessional. “But, we do some pretty crazy things to get the information we need, especially when it comes to, like, beauty and health. So, I am definitely willing to do Kim’s test to prove that I’m healthier.”

In order to collect enough sweat for the test, Kim, Kourtney and Jonathan head into a sauna -- wearing thick bathrobes -- and slowly let their skin drip into the vials. Watch: