Just to through a monkey wrench into this discussion let me point out that there are those who insist that garlic contains harmfull poison.
Arjuvedic medicine is absolutely against garlic and so is Dr. Bob Beck, our electro medicine hero. Dr. Beck said that airline pilots are not allowed to eat garlic on flying days because it effects their cognisance, their ability to reason logically.
I have been on much garlic for many years, but I had to give it up because I intend to follow the Dr. Bob Beck protocol. This question has come up before on curezone, that's where I first learned to my horror that we have been decieved thinking that it one of the best things we can do dietwise.