DOES ANYONE KNOW ANY GOOD DIGESTIVE SYSTEM CLEANSES?

Specifically for a busy vegetarian.
  1. I recently have had some digestive issues that landed me in the ER on Friday (the short version of this story is that I have gastritis).
  2. I've been trying to find a good digestive system cleanse to go on, but there's so much information, and it's daunting.
    I don't know what to believe either, what's legit and what's just a company trying to sell their products.
  3. So does anyone know any good ones?
    Like I said in my introduction, they need to be vegetarian-friendly, and the easier they are to prepare, the better.