Beginning from 385 pounds means quite a distance ahead, so full strength levels will probably be necessary at some point. The 12mg level seems right to me for optimal fat reduction, sustaining results, and especially sustained wellness. Dropping 20 pounds across 4 weeks moves pretty quickly. Had the scale stayed put before starting this? Having already dropped 55 pounds earlier, if things had stabilized, maybe half of that recent loss was just water weight instead of actual fat. Readings in coming weeks are likely to indicate a reduced but truer rate of change. Shedding more than 2kg each week just does not last long for anybody, except perhaps when starting very large, consuming minimal food, and staying quite busy. Right now there is no need to step up quickly unless hunger becomes bothersome, though I would plan on moving toward bigger amounts over time rather than staying small. Others here tend to recommend keeping everything as minimal as can be managed, yet that does not seem suitable when dealing with major weight issues, provided unwanted effects stay away.