I use L-arginine for bodybuilding and I don’t think it helps me greatly in Penis area. I take considerable amount of Arginine (about 8gram, thats 800 mg) per day.
Here’s what I know about Arginine and effect it has on me: The basic promise of arginine for sexuality is that it expose to increase Nitro-Oxide (same effect as Viagra). However, there is a problem with what you buy over the counter. Typically, the half-life of arginine is less than couple of seconds - pretty useless to do anything when taken orally. There are couple of company that makes L-arginine product with some sort of time-release method (which I am taking now for workout). However, to get this type of arginine, its very expensive (about 65-70 dollars for month supply).
Here’s what effect it has on me (the expensive stuff) - when I workout, it give me a great pump where my skin feels like it will rip to shredd and it last for few hours (even after workout - this is the effect of time-release).
Effect it has on my boner? None - okay may be little - but really negiligible (to spend that kind of money).
Since I take lots of stuff for my workout (I’m like human test tube - but I don’t combine stuff, always in cycle so that its easy for me to see what effect it has on me), here’s what worked for me in terms of my libido/erection …
Basic (this is stuff I take no matter what) - Vitamine E (400mg), vitamine B (don’t remember the gram, but its about 600% of DV), Calcium, Chromium, vitamin C, and Milk thisle (this is just to protect my liver from all the stuff I take).
Tribex 500 (name of the brand) - its herb mixture that increase your testastrone production(its not pro-hormon, or pro-steroid - it help your body produce more, rather than injecting - so it pretty safe). This made me feel like a young man - boing!!!
L-Arginine - Didn’t work for my gonad.
Creatine - oh, bad for your gonad - stop taking this if you want to have good hard on. (but its does build muscle, which is what I wanted)
There are few other that I like, but its really more for workout (meaning too expensive for just getting a hard-on - get a viagra, its cheaper).
Just remember that this is what worked for me and you have to search what works for you. One thing to keep in mind is - if you are having erection problem - first determine if you have circulation problem (or related) or low testastrone problem, then search for your match.
Hope this helps.