Description: Testosterone replacement therapy is a great option for men who are experiencing a decline in their natural testosterone levels and want to feel young. Testosterone levels naturally decrease in men over the age of thirty and gradually fall below normal levels. The symptoms of a low testosterone range from fatigue and irritability to reduced muscle mass and erection issues. If you've noticed these symptoms, contact a doctor immediately to find out if you need to take testosterone replacement therapy. The selection of the appropriate testosterone preparation depends on the patient's preferences, the patient's PKs, and the cost of the therapy. In addition, patients should discuss their insurance coverage when choosing testosterone preparation. It is important to note that there are over 30 different forms of testosterone replacement therapy, and it is important that they choose the one that best fits their needs and risks.