I had my liver enzymes tested on 200mg a week of tren and had no elevated levels. I believe it is dose dependent. Right now I am doing 200mg of tren, 100mg of test,and 25mg of adrol. Once again, as you can see, its very low doses. I think if you go high with all of theses then you would have heavy liver strain.
FYI. I only believe in short cycles too. 6 weeks or so.