Straight off the bat i can tell you that your probably overtraining and undereating. If i read this right you only eating twice a day? At 12 and 6? Thats the opposite of what you want to do. If you can do it you should be eating every 2-3 waking hours. Or basically as manny small meal as you can over the course of the day.
And doing your whole body twice a week plus cardio probly has your body in starvation mode conserving calories, doing the opposite of what your trying to achieve.
Untill you fix that no supplement in the world will help you.