Western Europe does agriculture/food-production/food-distribution more or less the same way we do it in the USA right? How have they avoided the dietary changes (like the glut of sugary foods) that we've undergone in America?
That being said, Europe is not immune to expanding waistlines. The UK is not far behind the US in obesity and overweight population. It is a similar story across the rest of Europe.
I think the key differences is that Europe has avoided the opioid crisis the US is experiencing, and the US suicide rate is also much higher. But other deaths rates, such as from alcohol abuse and obesity, are comparable between the US and the UK.