President-elect Donald Trump’s nomination of Robert F. Kennedy Jr. for Health and Human Services has brought renewed attention to Kennedy’s stance on health matters, including his belief that beef tallow is a healthier cooking fat than seed oils. On social media, Kennedy recently cited beef tallow as a more natural, nutritious option, especially compared to widely used seed oils like canola and soybean oil. In an October post, Kennedy suggested that seed oils are a primary contributor to the obesity crisis, tying their rise in popularity to fast food chains like McDonald’s. The shift from beef tallow to seed oils...