Khloé Kardashian's "Best Beauty Secret" Isn't What You Think It Is

Khloé Kardashian has always been open about her beauty routine. (Who wasn't all ears when she talked about her tips for getting her glowing, smooth skin back in December?) Younger sister Kylie Jenner asked Kardashian for her "best beauty secret" in her latest vlog, and you might be surprised that it has to do with her hands.

"I think people need to know this about you, like your hands, look like you're 17 years old. She has the best, youngest hands," Jenner said in the video, and Kardashian admitted that her best beauty tip is to put sunscreen on her hands.

"I have sunscreen in all of my cars, because [when you're driving] . . . the sun is beaming on your hands," Kardashian said. "Your hands and your neck tell your age."

Yes, dermatologists would unanimously agree that slathering your hands (along with the rest of your body) is golden advice — but you might want to stash your sunscreen elsewhere. As convenient as it is to keep sunscreen in your car, the heat can cause the active ingredients in the lotion to break down.

In the video, Kardashian and Jenner discuss more beauty secrets, including Jenner's shower routine and how long Kardashian takes to get hair- and makeup-ready. See the vlog ahead.