Expensive s—t that’s worth it, French edition.

Bethenny Frankel loves a drugstore find, so when she raves about a pricey beauty product, you know it’s the real deal. And when the “RHONY” legend recently posted about my favorite luxury French skin care brand, it was a true IYKYK moment.

In the Instagram Reel, the “Just B” podcast host shares that she is “obsessed” with the Yon-Ka Paris Intensive Vitamine C Serum.

“It goes on like a dream,” she says, raving that it could be her “new favorite serum.”

Made with 99.9% natural-origin ingredients, the formula helps lighten dark spots, brighten tone and boost radiance. It’s in an oily base that sinks right in — but leaves skin moisturized and supple all day. (Plus, as Frankel says, a little goes a long way.)

The “Just B” host follows the serum with the brand’s “invisible” SPF 50 Mineral Fluid Sunscreen, saying, “It hydrates, it’s not sticky, and it doesn’t burn your eyes.”

I understand why the entrepreneur loves the vitamin C serum so — I’ve used it so often that mine is nearly empty. C’est triste!

It costs $178 for a full bottle, making it one of the more expensive products I own — yet, it also earns my “worth it” status. I apply it with chilled cryo sticks in the morning for an unparalleled glow (and sensorial experience) that has people complimenting my skin more than ever. It’s perfect with gua sha as well.

While it’s rich enough to use alone in summer, as the weather cools, I layer it with Hydra N°1 Crème for the softest skin all day. Even better, the line is free of perfumes and chemicals that irritate my sensitive skin.

Used at luxury French spas like Printemps in Paris and New York City, Yon-Ka recently launched at major beauty retailers like Nordstrom and Ulta — so it’s about to become a well-known skin care staple stateside, too.