There are supplements out there that promise to increase your libido while also upping your testosterone. There are over the counter testosterone supplements and prescription supplements. There are supplements that market themselves as T-boosters, while also touting themselves as an aphrodisiac. And then there are companies that claim to have developed a testosterone pill that contains the triumvirate of male-enhancing properties: T-boosting, libido-enhancing, and even fertility-increasing. These supplement makers sometimes throw in an additional claim of muscle gain as well.
Conclusion: these studies found that castrated rats lived slightly longer than a similar group of intact rats. Castration is not, of course, a guarantee of longer life for an individual rat. Rather, considered as a group, castrated rats have a moderately longer average lifespan than a similar group of intact rats. However, other factors, such as exercise, mating, and restricted food can prolong life even more than castration when compared to similar groups of control rats. Longevity is subject to a wide variety of factors, and hormonal state is just one of the many variables that plays a role in determining how long an individual might live.