Although there are some dietary drawbacks to eating butter, carbs is not one of them. You will find that there are actually zero carbs in butter because it is an all-natural food. And while butter may not contain any trans-fat, it does contain quite a bit of regular fat, around 80 % actually. Those who are on a strict diet and are trying to keep that extra fat off their bodies might want to steer clear of butter just because of its high fat content.
Those who are obsessed with cutting down on carbohydrates though will definitely be happy to learn that butter is a zero-carb food and all natural. People who go on the Atkins or South Beach Diet are usually allowed to eat butter because of the fact that it has absolutely no carbs.