This is a very interesting abstract about a 2003 study using two NO-producing supplements that hasn't been discussed in this forum yet. Abstract 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 known to increase production of NO by nitric oxide syntase together with L-arginine as substrate for this enzyme. The study included 40 men, aged 25-45 years, without confirmed organic erectile dysfunction. Throughout the 3-month trial period, patients received 3 ampoules Sargenor a day, a drinkable solution of the dipeptide arginyl aspartate (equivalent to 1.7 g L-arginine per day). During the second month, patients were additionally supplemented with 40 mg Pycnogenol two times per day; during the third month, the daily dosage was increased to three 40-mg Pycnogenol tablets. We obtained a sexual function questionnaire and a sexual activity diary from each patient. After 1 month of treatment with L-arginine, a statistically nonsignificant number of 2 patients (5%) experienced a normal erection. Treatment with a combination of L-arginine and Pycnogenol for the following month increased the number of men with restored sexual ability to 80%. Finally, after the third month of treatment, 92.5% of the men experienced a normal erection. We conclude that oral administration of L-arginine in combination with Pycnogenol causes a significant improvement in sexual function in men with ED without any side effects. This is the link: Treatment of erectile dysfunction with pycnogenol ... [J Sex Marital Ther. 2003 May-Jun] - PubMed result I am using these, but did not phase in like the abstract describes. I take 1500mg of L-arginine and 120mg of Pycnogenol -- both found in pill form. From the first day I felt stimulation during the evening and woodies in the morning. From what I read about both, particularly abot pycnogenol, both are healthy for your whole body, not just your penis. Where to get them? L-arginine is avaiable almost everywhere. I got pycogenol at a health vitamin store, but also ordered online. Anyone else try this formula?