Sensational headlines claim that sheep’s wool could “regenerate your teeth,” but the reality is more measured. Recent research from King’s College London shows that keratin—an abundant protein in wool—can form a mineral-rich coating on enamel under lab conditions. This suggests a potential for repairing early enamel lesions, not regrowing entire teeth. While the science is promising, it remains at the laboratory stage, with clinical trials still needed. For now, dentists and patients should view the wool-tooth connection as an exciting but unproven glimpse into the future of preventive dentistry.