The main side effect of using beef tallow on the skin—and one that I experienced—is acne. “Beef tallow is comedogenic, which means it can clog pores. I recommend that patients with oily, acne-prone skin stay away from beef tallow to avoid increasing breakouts,” explains Dr. Hartman.

If you’re considering beef tallow for skincare, it may help with dry skin due to its fatty acid content, which supports hydration and barrier protection. However, it’s highly comedogenic and might worsen acne, especially for oily or acne-prone skin.

It may seem like something you eat would be fine to put on your skin—but experts say there are better, clinically proven options.