I read somewhere that testosterone levels in men around the year 1900 ranged more around 800-2000 ng/dl, than they do today at, 300-1000. I can understand this do to all the environmental estrogens we are exposed to daily, which must play some role in the declining levels. But it begs the question, if this is true, why is the normal range 300-1000? I think you'd be hard pressed to find a guy who feels GREAT at levels in the 300's, or I'd venture to even say 400's. Additionally, people who supplement exogenous testosterone usually report feeling amazing at levels around 1000 or even above, so long as they keep all their other hormone levels in check, which seems to be best accomplished at injecting frequently, ie 1x/wk, 2x/wk, or even EOD. I'd love to hear your thoughts. Why are we being told one thing, when the majority of case studies and personal testimonies from websites like these seem to say differently?