Nothing changes the way I look more than tren. But the "item" as you call it that has had the greatest overall impact has to be test. Without the mass growth from test none of the rest is possible.
I know it's not on your list, but I'd have to say. . .vagina. Pretty much everything that I've ever done to my body was in the interest of pursuing or maitaining an adequate supply.
Wow....getting quite a few "food" responses. I guess when you stop to think about it, that really is key.
Ulter, I agree with your test comment. Test is by far my favorite but I seemed to make the most dramatic changes when I used var. I think I got out of var what most get out of tren.