Figured I probably bog the parasite, giardia lamblia. We ate from a vendor in town, not once, but twice! I know, stupid thing to do! After a few days back from Mexico, started with the bloating, lower abdominal pains, felt really crappy for 2 1/2 months. I would feel OK most of the time, but would get flare-ups especially if I ate high-fat foods like french fries, etc. That was three years ago, but still each time we come back from Mexico, I feel crappy again for about a month. Then it clears up. We going to Mexico again in 3 1/2 weeks- we'll see what happens again. I've read and I'm told that parasites can live in your body for years. But the probiotics and the enzymes - I'll just keep taking them.