Cant say that the Herbalife has had that effect on me, probably the opposite really so without seeing what else you are eating its hard to say. You are doing lots of workouts - are you eating and drinking enough ?

I've experienced that before. Partially I think our bodies are getting used to different things being put in and we are kind of "detoxing" from the bad stuff. Also, depending on the plan your following are you still getting enough calories a day? I found a few days (even though I wasn't hungry) I wasn't making my minimum calorie goal and therefore didn't have much energy to run on. Make sure you are having a snack in between meals so your eating basically every 1.5 hours. Lastly, whenever I start feeling like I'm sluggish I drink some of the tea and that usually wakes me up