I would like to offer a bit of background. I have spent the past 25 years researching and studying testosterone. I started writing on testosterone in 1991, so I have had an extensive knowledge of the topic for decades. I have also studied and taught at a number of colleges and universities on this topic. In 1996, I founded The Endocrine Society and in 2001, I founded the International Society of Testosterone Research and the Association for Testosterone Research. As an early member of this society, I have been involved in the testing of testosterone-related products (such as Testosterone-Phenylalanine [TPN] pills), as well as many other aspects of the testosterone-related research community. I have published on the topic extensively in scientific journals, including The Endocrine Society Journal and The Journal of Clinical Endocrinology and Metabolism (which published my 2002 review of testosterone-related health issues). I was also a co-author on The Endocrine Society's 1993 position statement on the topic of testosterone and the health consequences of chronic excessive testosterone exposure. And I am currently writing a book about testosterone for children and young adults.
There are many different kinds of products that can increase testosterone, and many of them are available today. I personally believe the best approach to increase testosterone is through the use of a healthy, natural supplement.