I think the dose you need for injectable leptin to be effective costs around 1k/day but that was a few years ago. With that said, if you lose weight you will increase your sensitivity to insulin. That is your main problem, you are overweight. Use refeeds when cutting to raise leptin and do not consume fructose or dietary fat on refeed days. If you are intent on using something besides diet research bromocriptine. Also look into chromium, cinnamon, alpha lipoic acid, vanadium, magnesium, zinc, reseveratrol (go with Longevix brand).