For Olympia, it's not enough, but ...

I guess since about six weeks early and the evening capsule. In recent days I have now the impression that there was a slight effect setting: I regenerate faster after strenuous days and feel fitter overall. Lens I can tie an improvement even on the longer endurance on the rower.
To rule out that I do not especially feel my training success, I will soon make an L-arginine pause and observe the change.
At the moment I would therefore not go so far as to call it "magic bullet" - I think that would be too much to ask. But at least in conjunction with regular exercise (3 to 4 times a week), I realize a performance gain, the so far I could not achieve.

For those who do not have as strong stomachs: I tried to take 2 x 2 capsules daily, but always got shortly after taking digestive problems. With just one capsule, right before meals it works.