From a sexy oldster, age 70, let me warn all male readers of any age about the problem of low testosterone. Testosterone level is something that a Dr DOES NOT automatically check when he takes the blood tests during your annual physical exam. Those 3 vials of blood drawn check for many things, including possible postrate problems, but not Testosterone level. YOU HAVE TO ASK THE DR SPECIFICALLY TO CHECK FOR TESTOSTERONE LEVELS, guys! Then it gets done. If you are having any kind of erection problem, loss or lessing of sexual desire, etc, get your Testosterone level checked at your next annual exam. And ask to try a Prescription supplement if your results are still within acceptable ranges, but on the low side of the range. You may find a simple answer if you are experiencing any kind of male performance, or interest, problem. Grandpa