I have just found a new fix. It works wonders for me!!!

Cabbage - a small amount steamed with my dinner has made sure that I am as good as clockwork every day. I know its one of those veg that a lot of people don't like so maybe it isnt an option for a few of you but for myself I haven't had to eat a bucketload for it to work, it is just a small serving in with the rest of my veg.