What is testosterone cycle and light colored stool?

2 different things. Testosterone cycle refers to a series of Anabolic steroids used by body builders to increase muscle mass & strength. Light colored or clay colored stool suggests biliary obstruction. In other words, bile is not draining properly for some reason. Non-oral bio-identical testosterone really shouldn't cause any liver issues but oral non-bio-identical testosterone may. Some Anabolic steroids can, too.