I guess I’m the first to comment, which explains why I did not see a link to the guide. I had my testosterone tested earlier this year, mainly out of curiosity rather than any particular symptoms. It was at the high end of “normal.” As I started thinking about it, I wondered if this tells me much of anything. Wouldn’t one have to have T tested at say, 18 years-old, so that you had a baseline for yourself when you were (presumably) young and healthy (I’m 71)? Here’s why I’m skeptical of some medically created scale. I was recently diagnosed having hypothyroidism, based on a TSH level way above normal. (I had gained considerable weight without dietary changes over the previous 2 years or so, as well as some other suspicious symptoms.) My MD immediately prescribed Synthroid, which I gather is the standard, allopathic MD response. I started doing my own research, and discovered that I should have been tested for T4, T3, and antibodies, too. I insisted on this to my MD, and my antibody levels were through the roof. Voila! Hashimoto’s Thyroiditis. My TSH, T4 and T3 levels had returned to normal, so my MD would have said there was nothing to worry about while my immune system destroyed my thyroid. I asked him what I could do to lower antibody levels, and he said: nothing. Further research revealed selenium, magnesium, iodine, and black seed oil supplements might help. I re-tested about 3 months later and my antibodies have been reduced 31% and 55%. These arbitrary scales enable knee-jerk reactions from MD’s without getting to underlying causes and actually making patients better. So back to the T question. MD’s seem to be either scared or ignorant of hormones; even endocrinologists often aren’t any help. Don’t be surprised if your MD doesn’t even want to discuss testosterone! Do your own research and be your own advocate.