Yes, I've tried Viralprin. I used to take Valtrex for about two years, but had to stop due to the fact that I lost my insurance coverage. I also tried Dynamclear, but it burned too much which is exactly why I switched to a supplement. I saw that same site you listed, and they rated Viralprin the highest. I have been using it for about three months and it seems to be good so far. I will have to check back in and let you know when I have another outbreak. Have you also addressed your health. Besides taking a supplement, I also improved my diet and started exercising again.