I'm on the gel, been on it for almost half a year now. The reason why I started is an odd one - I fell off of my bicycle almost 2 years ago and fractured the head of my radius - that's the bone in your lower arm that's on the wrist side. The break would not heal for over a year, even with a bone growth stimulator. My orthopedic surgeon sent me to another doctor for my back pain (I have arthritis in my spine), and one of the first things he did was to order a bunch of lab work. The studies showed that I was severely deficient in Vitamins B, and D, and my testosterone level was also very low. Come to find out that these three things have a lot to do with calcium deposition, which is a necessary component in healing a fractured bone. Started me on high doses of Vitamin D (orally), Vitamin B (a topical cream), and testosterone (a topical gel). Just for kicks, I also went back on the bone growth stimulator to really try and get the fracture to heal. Well, x-rays don't lie. Within a few months, you could clearly see calcium deposition in the fracture line. After about 6 months, x-rays showed a healed fracture. One year later and you can see a bit of callus on the x-ray at the fracture site. They continue to monitor my testosterone level, but it remains low (sometimes, when you start with a supplemental testosterone, it gives the body a "wake-up call", and it starts manufacturing testosterone again. No such luck for me. I'll have to continue taking it for the rest of my days. Note the testosterone supplement I use (Andro-Gel) is only available by prescription, and it ain't cheap (over $100.00/month - and that's with insurance co-pay). There are also side effects - try acne at age 57. You can get testosterone injections, and they are significantly cheaper than the gel, so that is a viable alternative for those of us that could use it, but may not be able to afford it. To me, it's worth talking with your doctor about the topic. Let him/her order the labs, and then see where you are and go from there.
Best of luck,
Dave