Believe it or not, non-steroid using individuals may experience heart muscle growth through rigorous exercise (such as aerobics). Steroid users differ in that the more they use and the longer they use, the more potential there is for growth. Negative side effects may not surface unless abuse becomes the norm, but it is best not to take the chance. Additionally, consistent steroid users may experience a decrease in the size of the heart muscles when they stop using. This essentially means that the heart starts to shrink. Again, past use/habits are likely to influence the level of change.
Women - On the other hand, women often experience a "masculinization" effect from anabolic steroids, including the following:
Stages of Liver Damage
A group of enzymes, that are located in the endoplasmic reticulum, known as cytochrome P-450, is the most important family of metabolizing enzymes found in the liver. Cytochrome P-450 is the terminal oxidase component of an electron transport chain. It’s not a single enzyme, but consists of a family of closely related 50 isoforms. Six of them metabolize 90% of drugs. There is a great diversity of individual P-450 gene products and this heterogeneity allows the liver to perform oxidation on a vast array of chemicals, which includes almost all drugs.