A couple years ago I saw a commercial for McDonald's the jist of which was that a fit young man got up, had a healthy breakfast, and went to work, full of energy and ready to get on with his day.
By the elevator he run into a bunch of his cooworkers, all of whom looked sleepy, were dragging their feet, and definetely didn't have any energy.
The tagline of that commercial was something to the effect that he's fine, but the rest of us need our McDonald's coffee and breakfast fix in the morning.
The point that they were trying to drive home, I think, is that a McDonald's coffee and breakfast is going to get you going in the morning. What I saw when I watched it, however, is that if you're fit, eat well, exercise, follow a healthy lifestyle all around, then you're gonna be full of energy and just ready to get going. However, if you have McDonald's (or eat junk, period) then you're gonna be slow, sluggish, out of shape, and pretty much look like a zombie in the morning.
The fact that I have only seen this commercial once in my life makes me believe that I'm not the only one that interpreted it that same way, and it was quickly pulled off the air.
My point with this post?
Avoid eating garbage. Exercise. Try to make healthy choices in your life and you're going to be healthy, have proper weight and body composition, and have a well functioning imune system.
Even if I'm wrong about the commercial.
Be healthy!