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Credit: Getty Images/John Sciulli

If you’ve ever wondered how the Kardashians keep their skin looking so flawless despite daily makeup application and heavy travel, we can finally lend a hand. Today we learned one of Kourtney Kardashian’s beauty secrets and friends — it’s a goodie.

Speaking to Refinery29, the 37-year-old mom and entrepreneur revealed that she keeps her under-eye area looking soft and smooth with one simple trick:

You can grab a bottle from Amazon for under 20 bucks!

Kardashian also said that her diet plays a big part in keeping her skin looking healthy and clear. She’s eliminated dairy entirely — “I feel like I have way less breakouts,” she says — and she swears by the daily smoothie introduced to her by her Brazilian baby nurse.

“Every morning, pretty much, I have an avocado shake,” she explains.

Sounds a lot like the avocado-honey-water smoothie Brazilian model Adriana Lima swears by! And if these two are eating it — and looking this good — we’ll happily swap out our usual breakfast choices for this simple smoothie. Thanks, Kourt!