In winter I often in a bad mood and I'm often times ill. Therefore I have ever tried the OPC capsules. I have read a lot of good things about OPC and the very few to no side effects. The delivery came as Amazon accustomed very quickly, so I was able to start taking the two capsules per day. The capsules can be taken very easily, taking the morning and evening quickly becomes routine. I have noticed an improvement in my mood after a few days, I had much more desire to do something. I take them now since 4 weeks and was so far not ill, while all colleagues coughing continuously or have a cold. I think right now in winter stop taking the capsules grape is certainly a very sensible measure.