My guess is that your ED was cured because the Hcg increased your T, perhaps as much 500 ng/dl. I've pasted a summary of a study I recently read when I was looking into this. If it were me, I'd go with Hcg over viagra or cialis any day. Best of luck.
"Low-Dose Human Chorionic Gonadotropin Maintains Intratesticular Testosterone in Normal Men with Testosterone-Induced Gonadotropin Suppression?"
This was a 3-week trial. Baseline for all groups was 407 ng/dl (with an intergroup range of 355 to 441). The average age was 24 (range 18-41).
Everyone received weekly IM of 200mg T enanthate throughout the study. The participants were then split into four groups to test the effect of adding HCG. The Hcg doses were 0 IU (placebo group) 125 IU (EOD), 250 IU (EOD), and 500 IU (EOD). Unfortunately, exact serum T levels are not disclosed (as far as I see), but they are charted out on a graph so you can estimate pretty closely.
The results at the end of the third week were as follows:
IM 200mg T enanthate
plus 0 EOD: ~779 ng/dl
plus 125 EOD: ~750 ng/dl
plus 250 EOD: ~1295 ng/dl
plus 500 EOD: ~1270 ng/dl
I can't tell when blood was drawn in relation to enanthate injections, so it's hard to know whether the results were during peaks, troughs, or in between. But the takeways for me are:
- 125 IU hcg EOD didn't increase serum T at all (when taking enough T enanthate to shut down natural production)
- 500 IU EOD didn't increase serum T any more than 250 IU EOD.
The focus of the study was on spermatogenesis, which I couldn't care less about, but as far as serum T, this study supports the use of 250 IU hcg EOD.