1) there are no supplements that will do anything major. If you notice the fine print it always says results are from the pills, a healthy diet and exercise. Guess which 2 are the actual cause of the weight loss?
2) Stop eating low calorie. you're probably starving yourself and you don't even know it. Long gone are the days of eating low cal and doing just cardio. You need to fuel yourself and you will be surprised at how much food you actually get to eat. And it's awesome!!
3) if you want to build muscle you have to lift weights. No you will not bulk up like a body builder. Women aren't built to do that and it takes steroids to get that big.
4) I highly recommend following a plan like 21 Day Fix. google it. It's amazing and I had awesome results with it. I'm just about to start it again tomorrow as I need to lose some weight before ttc again. and no it isn't some fad. 7 workouts, 2 are active rest day (pilates and yoga) and an amazing nutrition plan that focuses on portion control not calories.