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Performance enhancing drugs like steroid intimidate your body. Even though you will never use steroid you will get to know the affects of drugs on muscle. If you are a body builder and you feel that you have already met your genetic potentials than you must be the one planning for steroids for better performance. Know how you get affected by the use of steroid and other performance enhancing drugs this from this book.
Used availability for Maya Angelou's Performance Enhancing Drugs and its effects