In recent years, many governments and food companies have introduced new codes on food advertising to children. A report in Obesity Reviews presents findings from a systematic review of evidence on levels of exposure of children to the advertising of less healthy foods since the introduction of these codes. Scientific, peer-reviewed papers show that high levels of such advertising of less healthy foods continue to be found in several different countries worldwide. In contrast, the evidence provided in industry-sponsored reports indicates a remarkably high adherence to voluntary codes. We conclude that adherence to voluntary codes may not sufficiently reduce the advertising of foods which undermine healthy diets, or reduce children’s exposure to this advertising.