Keep in mind that I changed my diet to 6 meals, 2400 cals a day. This alone could cause a change in body comp. However, it seems that Drive is adding a little "edge" to the equation. Especially since I haven't lost any muscle. (I probably added a lb or two of LBM.) I can't say for sure. I'm going to continue to log this all the way through the end of the bottle which should be about 27 days.