I used to use Source Naturals Wellness Formula and it seemed to work well. However it made me run to the bathroom a lot and that was literally a pain in the butt. If Synthetic Supplements could make something comparable or better than that without the side effects it would be great. I'm always getting sick lately. It seems to happen especially when my body is in an anabolic state. When I start peaking and setting personal records, unfortunately I know sickness is close at hand. An anti-oxident product just isn't going to cut it. We need something innovative with science based research that is going to put all other so called "immunity boosters" to shame. Hopefully synthetic supplements will take the lead on this.