There are some people who take great comfort in the global ubiquity and consistency of fast food. Whether it's a McDonald's in Brussels or a KFC in Bangkok, knowing that the menu choices will taste the same as a location in Boise, Idaho or St. Louis, Missouri is somehow reassuring. But things are not always as they seem - or taste.

Maybe it’s time to revise the old adage, “all things in moderation,” because there are some things that apparently just aren’t good for you at all, even in modest quantities.

Artery-clogging trans fatty acids, aka partially hydrogenated oil, may sound like a lot of gobbledygook to you, but if you eat a lot of processed foods this cheap form of fat could cost you dearly. The National Academy of Science’s Institute of Medicine announced three years ago that there was no safe level of trans fat in the average diet.