Well, she technically credits it to Leonardo DiCaprio, but genius nonetheless.

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Meghan Markle, the Duchess of Sussex, is a thoroughly modern woman. She does close her own car doors after all. But, it turns out, like the rest of us, she too has some old-school remedies to ward off illness while traveling.

In a recently unearthed post from Meghan’s now-defunct lifestyle blog, The Tig, Meghan gave perhaps one of the the best tips we’ve ever heard to avoid catching a cold on a plane.

“If you’ve been tracking my social media of late, you’ll notice that not a week goes by without me finding my derrière on a plane,” Meghan wrote in 2016, just prior to announcing her engagement. “Yes, it’s fun, and yes, it’s purpose-driven, and yes, it can sometimes feel quite glamorous; but, jet-setting (for work or pleasure) comes with its own set of complications. The foremost issue is self-care.”

She then noted a few of her favorite ways to stay healthy on the go, including wiping down her seat, remote, and TV on a plane with sanitizer before sitting down, always having a probiotic handy, and never leaving home without a scarf.

Those seem fairly obvious. But, then Meghan added this gem: “A dear friend of mine once told me that Leonardo DiCaprio gave her an excellent travel tip. I know – I could have written an entire post on this conversation alone. What is it, you ask? Evidently, he said that to avoid getting sick on planes, he puts a little Neosporin on a cotton swab and coats the inside of his nostrils.”

Yes, Meghan, by proxy, got some good advice from DiCaprio and has been using it ever since.

“Not only does it create a barrier for germs, it also lubricates the skin in the nose,” she continued. “That’s important because when the skin cracks, germs can come a running in, so the coating of the Neosporin doubly protects you.”

As she noted, this was some seriously secondhand information, so while she can’t promise Leo actually does this, she can promise that she does. “It’s a great tip. Try it!”

The next time you’re on a flight, give this royally approved trick a try (or test another one of these ways to avoid catching the flu on a flight), and then, just for fun, imagine Meghan helping the Queen dab a bit of Neosporin into her nose during their next royal engagement.