http://www.21daykickstart.org/A Vegan friend recommended that site to me when I asked her for information. She recommended it over the PETA website due to the graphic content of the videos. I have been a vegan now for over 5 months and feeling great!
I started cold turkey (which is not recommended) and paid the price. I guess my stomach needed time to get used to all the healthy food... Lol! Seriously, I had problems because I went from a very unhealthy diet to one very rich in fiber and veggies too quickly. At first I didn't know what was going and had to ask another vegan that told me I went too "purist" too quickly and I needed to make changes slowly to avoid stomach problems. She recommended for me to get papaya tablets for heartburn and to drink "Good Belly" (vegan probiotic) to help with the sour stomach and to prepare the bowels for the new "meatless" bacterial flora. Three days later I was feeling great! My vegan friend told me that in addition, continue to eat fish while my stomach was weak and to quit fish once I felt ready. I only had fish once a week for a month and quit after that. Fortunately what happened in my case does not happen to other people. I suffer from acid reflux which was aggravated by the changes but to this day I have not had any episode of acid reflux!