Not eating meat is not healthy in my opinion. It is obvious that man has a long history of eating other animals and we are not alone in this. A lot of other animals eat meat as well. So there is nothing particularly wrong with it. I find what the band Tool has to say on the topic to be rather funny and on target:
And the angel of the lord came unto me, snatching me up from my place of slumber. And took me on high, and higher still until we moved to the spaces betwixt the air itself. And he brought me into a vast farmlands of our own midwest. And as we descended, cries of impending doom rose from the soil. One thousand, nay a million voices full of fear. And terror possesed me then. And I begged, "Angel of the Lord, what are these tortured screams?" And the angel said unto me, "These are the cries of the carrots, the cries of the carrots! You see, Reverend Maynard, tomorrow is harvest day and to them it is the holocaust." And I sprang from my slumber drenched in sweat like the tears of one million terrified brothers and roared, "Hear me now, I have seen the light! They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers!" Can I get an amen? Can I get a hallelujah? Thank you Jesus.
This is necessary.
Life feeds on life feeds on life feeds on life feeds on........
According to some not eating meat for moral reasons is or borders on being an eating disorder called Orthorexia. Latin for Correct Eating. This eating disorder is characterized by a persons diet becoming more and more restrictive over time in the individuals attempt to be healthy and or moral. Since vegan tends to be on the border of eating disorders I would be more worried about your mothers health than your own. I am not saying that all Vegan have an eating disorder, but it is often the veil eating disorders are shrouded in. Protein provides a lot of benefit, essential amino acids, satiety, testosterone production etc... To me Vegan just means more work maintaining a healthy diet and I don't have time for that. Meat is a perfectly normal and healthy part of the human diet and anyone that gets too worked up over it for moral or health reasons should be offered a nicely seasoned medium rare steak.