I've been taking l-citruline and pycnogenol with fantastic results. Good thick hang, better erections, great veins, energy, ect. Zero sides for me. For years now.
Read more here. (I traded L-Arginine for l-citruline because to get the suggested dosages you need powder and L-Arginine tastes like it came from the 6th layer of hell)
Penile erection requires the relaxation of the cavernous smooth muscle, which is triggered by nitric oxide (NO). We investigated the possibility of overcoming erectile dysfunction (ED) by increasing the amounts of endogenous NO. For this purpose, we orally administered Pycnogenol, because it is...
pubmed.ncbi.nlm.nih.gov