The only real source of testosterone is from your own body. However, if you have too much, it will not work properly. Your body must be balanced in testosterone. I have a lot of experience with the various types of testosterone that can be purchased from the internet. Below are a few of my personal favorites. I use Clomid, which is another testosterone product. I have read on the internet that Clomid has a higher chance of helping those with low testosterone. You will notice I don't list it on the bottom as a product to try, but I do recommend it for those who have low testosterone and need to improve their testosterone. Clomid is manufactured by the Gendex Pharmaceuticals company. It's the same company that makes Vioxx. Vioxx is a prescription steroid that was linked to many deaths. Clomid comes from a different plant that is in the same family as Vioxx, and it has no effect on testosterone production. I recommend only using Clomid in people with hypogonadism who are on testosterone replacement therapy, like myself. For the purpose of this article, I will use the terms "normal" and "abnormal" to describe testosterone levels. Hypogonadism can be defined as the inability to synthesize testosterone, so low testosterone levels can be normal, or a sign of a more serious medical condition.