Which oral nicotine products carry the greatest risk to oral health?In this GFN Science Lab presentation, Helen Cowie examines how the shift from smoking to smokeless and oral nicotine products changes the way tobacco harm reduction should be assessed.The discussion explores the current evidence on oral health risks across different product categories, including combustible cigarettes, traditional oral tobacco, snus and nicotine pouches. While cigarettes and several traditional oral tobacco products have well-established oral health harms, the presentation highlights evidence suggesting a substantially lower risk profile for oral nicotine pouches compared with smoking.