Remember that beauty workshop Kim Kardashian and her makeup artist Mario Dedivanovic were hyping earlier this month? The one that prompted attendees to fork over hundreds so they could get a taste of Kim-inspired makeup tips? Well, the event finally took place a few days ago, and according New York Magazine’s The Cut, Kim shared a surprising piece of wisdom about how she makes her hair look so great. Sure, she has a team of stylists at her beck and call, but she also relies on a stash of favorite products just like the rest of us, and one of those favorites is Olaplex, a hair-strengthening product she couldn’t stop gushing over: “When your hair is really damaged, if you sleep in that, it really works. I notice a huge difference!” (After her walk on the platinum side earlier this year, Kim of all people probably knows a thing or two about fighting hair damage.)

What’s important is that Kim wasn’t paid to endorse this stuff — she just loves it that much! The brand has no ads or endorsements, yet is beloved by stylists all over the country. It’s a step above a conditioner or mask, so it literally strengthens hair rather than simply adding moisture. It creates instant shine in color-damaged hair, and can occasionally by a lifesaver for heat-damaged tresses as well. The only way to get it is through a salon, though the brand is looking into other product options. In the meantime, you know what to ask your stylist for if you’re going for Kim-level locks!