Suspect placebo pills in bottle

I am seriously beginning to think that more than half of the pills in this bottle are placebo bills. Usually when I take this product I can feel my energy level increase. I usually feel a tingling on my skin which I know is a result of one of the ingredients in it (I forget the name) and I know it's working. It's not an over sensationalized feeling and feels great, to me. And I usually have a productive workout. But more than half the time when I take these on an empty stomach, prior to a workout, I feel absolutely nothing! I am completely baffled and very disappointed.

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