There is only one reason to be vegan and that is for the nonhuman animals. There are many ethical reasons to eat a plant-based diet. Surely we should expound on these reasons –e.g. humanitarian, environmental and health - but these are different moral issues.
is about justice for nonhuman animals. It is about living a life
without exploiting, killing, and otherwise harming other animals as far
as possible. It is not right to allow ourselves to adulterate this
definition, so that veganism turns into a speciesist way of living that
is all about or primarily about us humans – e.g. eating no or less
animal products to alleviate starvation, reduce the environmental harm
of our consumption habits, or improve overall Health