Tuna has been known to cause problems with constipation so if you have a history of constipation troubles it might be a good idea to avoid it as much as possible. Tuna has quite a bit of energy available for the human body which means that it tends to digest slower when consumed, sometimes leading to problems with constipation. You will find that many dairy products also cause problems with constipation for this very same reason.
Frozen meals that contain little protein as well as tuna noodle casserole and beef can all cause problems with constipation, sometimes even in small amounts. If you want to avoid becoming constipated, it is highly recommended that you learn which foods to avoid so you will be able to find relief from this problem which affects so many people.