Ask the Fight Doc: Can vegan/vegeterian diets hinder fighters such as Jon Fitch?

Ahead of his eventual majority draw with B.J. Penn at UFC 127, much of the pre-event discussion focused on Jon Fitch and his new vegan diet.

While once a massive welterweight who'd hit close to 200 pounds between fights, Fitch recently switch to an all-vegan diet that reportedly caused him to slim down prior to UFC 127.

Fitch finished strong against Penn, and his late-fight surge prevented a loss. But in our latest "Ask the Fight Doc" installment, MMAjunkie.com medical columnist Dr. Johnny Benjamin discusses whether Fitch's performance could have been affected by the dietary changes.

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