Healthy eating can feel like a tricky game. Some diet gurus insist that carbs are bad, while others suggest that low-fat foods can help people slim down.

The truth is more complicated, though, and nutrition experts are starting to insist that there’s just no eating plan that’s right for every body.

Still, there are some foods that scientists have found — after years of studying people who eat them around the world — to be associated with negative health outcomes.

Here are eight of the worst offenders, which science has suggested up our odds of developing cancer, gaining weight, contracting diabetes, and ultimately perishing earlier than we should.