This BMJ Public Health study finds that effective public health policies for tobacco, alcohol and unhealthy foods are most likely when different types of evidence are combined as an 鈥渆vidence jigsaw鈥, with different evidence supporting different stages of policymaking. 69色情片 on industry practices was seen as particularly influential, especially in tobacco control, while collaboration between researchers, advocates and policymakers helped ensure evidence was translated into policy action. The authors conclude that combining multiple forms of evidence with strong knowledge-sharing processes can strengthen regulation of unhealthy commodities.