There are men with low testosterone and it can be a problem, however usually it is not something very dangerous to health unless your levels of testosterone are severely low, in which case you should definitely consult with your emdic which will probably, likely recommend that you follow a testosterone treatment.
Testosterone treatment however is only for some, not for everyone as it is something that can cause harmful side-effects which is why it must be recommended by a medic, with proper dosage and so on. Your medic must tell you if you are healthy enough to receive such treatment, otherwise you could suffer more from it than you would benefit from it.
Testosterone is known as the male sex hormone, even though women have it too but men have it in larger amounts. Low testosterone levels has been time and time again associated with depression, erectile dysfunction, very low libido or sex drive, the loss of muscle, loss of energy and much more.
For every problem, there will be people trying to find some treatment or other people trying to make a buck out of it. In this case, there are many companies that produce many products that claim to help boost testosterone in the human body, one such example is Spartagen XT.
One thing that you can expect very often is the lack of clinical evidence for dietary supplements that are purchasable over the internet.
Another thing that you can expect, and so it is the case with SpartagenXT, is that it doesn't work as advertised. The claims will always be positive but if you look at its ingredients you find a lack of evidence and if you look at its online feedback you find that it is very mixed with plenty of user complaints. This means that you're paying up to $70 for a month's supply of a product that may not help you at all, because it has little to no proof, and it is very unreliable.
I've not used it personally, however I've looked into the research that the ingredients have and the lack of clinical evidence that the formula has and it's very hard to recommend it. At the very least, consult a medic before using it. It may be a waste of money and a potential risk to health.
