I read the article on this in Life Extension Magazine and held out hope that this might actually work. I'm 70 and, as most men my age, have low testosterone. I'm halfway through the first bottle and have noticed no measurable improvement. To be fair, I did not expect immediate results. I bought the four pack; one, to save money, and two, to give it a chance to succeed. Many of the supplements I take, Vitamin D3, fish oil, etc, have no quantifiable result, though I know they improve my health. This one will have to demonstrate a positive change to continue it's use. I hope to report that after another month or two.