No noticeable affect on energy level.
It seems ok after taking for a few straight days. No noticeable changes in energy level either way. I do take my blood sugar measure regularly and during the time I've been taking this, I have not seen prolonged high blood sugar levels which I sometimes get. No significant changes either way and no side effects. The number of pills are few relative to the large container that the pills came in. On a price per pill basis, I don't feel like this is a great value.