I follow the philosophy of veganism.
How long have you been a vegan?  I know it involves not eating anything produced by animals
About a year now. That is correct! Vegans abstain from the use of animal products especially in the diet.
Have you found any health benefits?  I have heard that a vegan diet goes a long way to reducing heart disease
I personally lost weight while on the diet. But everyone's body reacts differently, what may work for me might not be for you.
I know some vegans have issues with nutrient deficiency.  So you take any supplements to offset that?
A well planned diet meets all the requirments. But if not properly planned then a vitamin may be used compensate. I personally use a multivitamin just incase.