First of all, I am not new to the world of fitness and bodybuilding. I have been training for 4 years straight. I've missed days here and there, but never been away for more than 3-4 days. I can lift a lot and I've always done it.

However, I have recently started to lose a significant amount of my energy half way through my workout (after an hour of working out since I usually work out for 2 hours 5-6 days a week).

At this point you can assume I have NEVER had any energy drinks in my whole life. I honestly am not aware of what they are and how they accomplish their task, and I don't take anything I don't know.

What I am trying to find out is:

1. what should I consider doing (whether using energy boosters or anything else)?
2. What are the side effects of those energy drinks advertised here and there?
3. Should I consider taking any?

I don't know if my age matters, but in case it does, I am 24 years old.