Going vegan can be due to a variety of reasons. Health issues, weight loss motives, nutritional diet and even for religious reasons people decide to become vegan. Beside these reasons, the Harvard Medical School has put up a very interesting article about many issues that are also involved with a vegan lifestyle.
Becoming vegan is not only changing your eating habits. This for itself has already so many beneficial health effects that it would be more than worth it to adapt the vegan lifestyle. The good news is that beside restoring and maintaining your health the impact on animals and the environment is awesome not only for this generation but for many generations to come.