In over 35 years of trying lawsuits either as a trial lawyer or trial judge, one of the very few things I can say for sure is that no matter what the subject or area of dispute may be, if one side calls an eminently qualified expert to testify, the other side will almost surely call one just as qualified to say exactly the opposite. I have heard many, many medical cases where groups of apparently great docs. , claimed those on the other side were completely wrong, both as to diagnosis and as to treatment. one must evaluate the evidence and arrive at his or her own conclusion and then live with the decision.
(At times listening to these expert disputes, especially when between highly praised medical doctors, was downright discouraging;kinda makes you wonder when you see a Dr. whether some other just as qualified MD. would tell you something very different. )
Such disputes are not restricted to medical areas either; you see the same sort of expert disputes in most any area.
I do draw your attention to the middle of Mercola's comments where he pretty much qualifies his support of beef based upon the animal being raised eating its natural feed-----few of us can do that.
By the way, I am not a vegetarian, but I do believe that a very substantial portion of our diet should be raw fruits and vegetables.
Good wishes how ever you proceed.
vaughn