It is really hard to tell because there are so many factors influencing it. Even the brand matters, as some companies produce higher quality steroids that are less liver toxic, whilst other companies are more negligent in matters of product quality. My bet would be Tbol, as it gives leaner gains, but I can't say that it is more or less liver toxic. There is also such thing as individual sensitivity to compounds....so as you can see, it is too hard to tell.