How much caffeine are you using? For me, I am always tired when I'm using it. Quitting caffeine was the best thing I ever did for my energy. I had to take some time off work to do it because I had such a strong withdrawal.

When someone is complaining of being tired and they are using caffeine, I see it as a "well, duh" situation. And I say "using" because it is a drug. It has a detrimental effect on the adrenals over time (among many other negative effects). It's fake energy and doesn't allow one's own energy to thrive.

Also, how much fat do you eat? I get a great deal of energy from increasing healthy fat.