AP is great for muscle preservation while in a caloric deficit - it's method of action prescribes it. Do not concern yourself with absolute weight (i.e. 160 vs 142lbs), but rather, the quality of the weight (i.e. determinate shifts in LBM vs adipose). In that respect, AP's ability to alter the energy expenditure mechanisms of both adipocytes and myocytes will help you to achieve an aggregate shift in body composition; away from fat, and towards a more muscular build.