Using beef tallow as a moisturizer is trending on TikTok with ‘ski’nfluencers touting its benefits, but is it really all that? Peter Lio, MD, a Clinical Assistant Professor of Dermatology and Pediatrics at Northwestern University’s Feinberg School of Medicine and a Partner at Medical Dermatology Associates of Chicago in Chicago, IL, weighs in on whether beef tallow should have a place in a skincare routine.