I and many millions of others haven't ever eaten meat and I, at the very least, am very temperate as you can tell by this post
I'm amazed you have the courage to argue with a doctor/physiologist! You're very brave and you are very wrong.
あなたもお忙しいでしょうし、今日はこのくらいにしましょうか
I am a lover to technology and developed medical science with the great modern diagnostic and surgery tools and devices that are undeniable. Nevertheless there are many physiological secrets and mysteries that scientists have not yet discovered them (they confess to this matter). One of the examples is cancer. Although, scientists have discovered that disease happen due to a genetic disorder, but don't know, what is the cause of that disorder is some persons.
They have opined based on some theories, some substances and foods are the reason of the genetic changes, among smoking, but it has not proved practically. Some smokers live up to 100 years and some Non-smokers and even children get cancer unreasonably. That shows, medical scientists are encountered many unknown and mysterious matters in physiology and medical sciences. Even God himself confirm medical science as a basic method of treatment. Let me to tell you a real story in this case:
The prophet Moses got a sickness. The believers around him said to him, " let to bring you a doctor". When doctor came, prescribed some medicine for him He refused and said, "I don't need those medicines, God will cure me himself"!
Afterward, whatever Moses waited for God to heal him, it didn't happen! He complained to God, "O God, why don't you cure me". God inspired him, " I don't cure you unless you use your medicines. Don't you know, the medicines are from me?" Moses took all the medicines and was healed.
After a few years Moses got the same disease and send someone to inform the doctor. When the doctor came, prescribed the same medicines for him. Moses used all the medicines, but he was not cured after a few days. This time Moses complained to God, " My God, as you ordered me before, I used all the medicines, but I was not treated. God inspired him, " this time you only trusted on the medicines absolutely and paid no attention to me that I am the creator and (final) healer".