I appreciate the help, but this all seems very far-fetched. I've never heard of such powders.
I sometimes have low energy, but that's logically related to either not eating enough or eating too much in once (digestive system takes up all energy). I have neither excessive weight, hunger cravings or even the slightest of anorexia. I'm quite healthy, but I could do with some exercising.
It was just a possible cause. You seem to be quite concerned about it, not that you're going on some sort of humble brag type thing.
I have a lot of male friends who workout quite a lot- most of them take a pre-workout.
It's a combination of arginine (which also gives men rock hard erections FYI), amino acids and other vitamins to help repair muscle tears. It comes in powder form to put into drinks or smoothies and men drink it before their workout, hence why it's called Pre-Workout.