Most products on this page are testosterone supplements, including some testosterone creams, and some testosterone patches, transdermal testosterone gels, and others. Some supplements are designed to increase the amount of testosterone in your body, others are testosterone replacement therapies. This page is about what the testosterone supplements do, what they don't do, and what they could do for you. If you want to get started, click on the search field to find what you're looking for. The next few pages are what you should know about what is in the testosterone supplement. Here you'll learn: What is in a testosterone supplement and what does it do? What is in testosterone supplements? This is a list of common names for products available at your local drugstore, or from some online store. I don't recommend buying from the internet store unless you are going to get your testosterone from a supplement. You need to find a company that is selling your testosterone product in a doctor's office or pharmacy. If you do find one of these places and have questions, don't hesitate to ask, and the people there should be able to give you honest answers to any questions you have. Testicular Health Tests (and how they work) Testosterone can affect your hormones and your ability to become sexually active.