Tren seems to have some kind of ability to allow you to eat and store more carbs in the muscles without getting fatter. I don't know why and I'm sure it is different for different people. My buddy was taking a decent dose and was very strict with his diet most of the time, too strict imo. But, he would break down and binge. He was training for a state contest one year and came to my house the day before and says, "I'm not doing it, I failed on my diet. I've gained 8 lbs in the last day and a half." All he had done was have a pizza and few extra carbs here and there. He took off his shirt and had veins on his abs. He looked big, full and lean- the best he's ever looked by far (a good 25 lbs over his previous years competition weight and more lean!). Too bad he just couldn't see it. But, yeah, he just soaked up the excess carbs and looked huge.
Jacob