It seems like the CNN Article was designed to cast doubt on the usage of test. to elevate levels in the human body. And garner the Yale science dept. some free press with a hot topic.The extrapolation and manipulation of the content in the article "Testosterone Kills brain cells" goes beyond journalistic embellishment.
Here is a better one: "low testosterone in older men is associated with increased mortality risk." In a four-year period, men over the age of 40 with low testosterone were about 70% more likely to die than men with normal levels reported by Richard O'Brien, Emergency physician and Temple University clinical instructor. From the Bottom Line Healthier magazine.
So, we can postulate then, when it comes to Testosterone: "too much, might be bad?, a normal level is good! But, a low level is deadly!!!!!"