Why is it that tren tends to raise ALT levels? Whenever I run tren, my ALT levels go way above the "normal" range, usually double. As far as I'm aware, it isn't 17AA, so why does this happen? Within a few weeks of coming off tren, the ALT values come right back down to normal. I realise that ALT values at 2x normal range isn't necessarily dangerous, but I'm curious as to why tren impairs liver function.