Veganism is the  practice of abstaining from the use of animal products
Oh, yes, I used to be one!
For someone that is a practicer of this, the philosophy is known as a vegan
Yes, now what's the difference between vegan and vegetarian?
There are categories of several categories of veganism.
Oh, and what are these categories?
You are either a Dietary vegans or strict vegetarians
OH, I see. Could you elaborate on the differences?