Despite what some people think, butter does not in fact cause constipation. Because butter contains so little protein, it is not cause this particular problem. It can however cause problems with bowel stimulation because of the amount of fat that is in it. People who have problems with constipation will definitely want to think about including more butter in their diet because of how beneficial it can be.
Although it is true that butter has a lot of fat in it, it does not have any trans-fat at all and contains no carbohydrates, two things that dieters are very concerned about when picking out foods at the supermarket. Even though there are some misconceptions with regards to butter causing constipation, it is simply not true.