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Open any French girl’s medicine cabinet, and you’ll likely find products by one specific brand: Leonor Greyl. The quintessential French brand has the ease and coolness of your classic Parisian icons (hello Caroline de Maigret and Jeanne Damas) and is a staple in their effortless, laissez-faire routine.

It was recently discovered that the Duchess herself, Meghan Markle, is a big fan of the storied haircare brand, too. Her hairstylist Michael Silva (who had worked with her since 2015) said that he uses Leonor Greyl’s Huile Secret de Beauté ($66) on all his clients (which also includes the Kardashian clan) to keep locks nourished and luscious. “This is pure luxury, packed with vitamins A and E, and fatty acids, which are great for detangling and bringing tons and tons of shine,” he said.

Leonor Greyl has basically paved the way for natural hair care, with a history as long as it has hair benefits. Started in 1968 by a hair fanatic, French-born Leonor Greyl and her passionate botanist husband, their first launch is still their most successful: Huile de Leonor Greyl ($59). This protective oil, a mix of botanical oils, can be used in a variety of ways to improve shine in dull, dry, or damaged hair. You can apply as a treatment on dry hair before shampooing to keep hair hydrated and smooth. And thanks to the natural UVA/UVB sun protection filters, you can apply the oil before sun exposure to protect hair from seawater, chlorine, and sun.

“This oil is such a French product, easy to apply with immediate results, it’s like that Parisian chic look with jeans and a jacket: easy and immediately chic,” says Leonor Greyl President, Caroline Greyl.

Celeb-approved Huile Secret de Beauté is equally multi-tasking and can be used on your hair and body. A mix of lemongrass and exotic oils tiare and yucca, it not only smells incredible, but it also protects hair from the sun too. Most impressively, it absorbs quickly, but imparts a gorgeous silky shin on hair, and leaves skin equally soft, glowy, and lightly scented.

Want a similar oil, but without the price tag? Try out Ouai Hair Oil ($28), which protects hair from color fading and heat damage, and can repair split ends. Or Verb Ghost Oil ($16) is quickly becoming a pro-favorite for its incredible shine and frizz-smoothing skills.

This story was originally published on January 24, 2018, and has been updated with new information.