Let’s get one thing clear: we’re all for circular living. No waste? Yes, sounds great. But when it comes to what goes on your skin—especially your delicate, hard-working face—we’re raising an eyebrow at the beef tallow beauty trend. Beef tallow, or rendered cow fat, has had a surprising revival lately. Fans claim it’s “ancestral,” “natural,” and “nutrient-rich,” which all sounds lovely... in a bone broth. But let’s look past the glow-up marketing and get into why tallow is great for greasing your skillet, but not so great for your face.