Do a three day fast and see if you can still be as active physically at the end as you are at the moment. That's a very easy experiment.
If you don't believe that changes in eating have any effect on how your body works there not even a price involved.
Haven't had one of these for awhile. This thread is for questions or comments that you've felt silly about not knowing/understanding. Let's try to exchange info that seems obvious, knowing that due to the illusion of transparency it really isn't so obvious!