The short answer is that with injection administration it is easier to determine the amount of testosterone your body receives and it is much easier to modify the dose. Injections allow you to achieve optimal levels to maximize outcomes while minimizing side effects. The costs to insurance companies and the chances of secondary exposure to other household members can be higher with the gels/creams. All of your options will be discussed with you in your initial consultation. If you are currently on a gel/cream and want more information from our healthcare provider please call us today at 800-246-LowT.