I bought the strongest one they had and unfortunately didn't feel anything personally. The company clearly cares and provides a good amount of additional information and they even threw in some extra samples of other flavors, so I appreciate their hustle. Unfortunately for me the flavor is too bitter, even while holding another piece of hard candy in my mouth at the same time. If I saw a strong affect it would maybe be worth it to me, but with the taste it would feel like a chore. If they can fi...