I think making a dietary change to influence body odor is WAY overanalyzing things, and has a minute change if any. A dog smells like a dog whether he eats Alpo or Science Diet.
I thought about starting a "Performance Enhancers for Deer Hunters" thread a while back, because I believe stimulants on the stand can make a huge impact on your hunt. I know that a 5 hour energy drink stays in my pack, and if I start dragging, I'll shoot it in a heartbeat. Makes 0 sense to be groggy in a tree. Counter productive, and not very safe.
That being said, I look at them as being like fuel enhancers. They don't do anything if there's no gas in the tank, and they won't turn a minivan into a sports car! I believe in exercising, eating right, and sleeping as much as you can during season.
I've lost weight, quit drinking, cut hair, changed jobs, and bought houses to give me an edge deer hunting, but I'll be jingle-jammed if I give up red meat or black coffee. And I wouldn't have somebody in my duck blind that wouldn't share a thermos of coffee with me.