Posted by iHerb Customer on Dec 25, 2007 | Verified Purchase
My profession involves taking care of people acutely ill with all manner of upper respiratory illnesses. I'm also a competitive runner, and have had problems catching colds within a week or so of a stressful long distance workout or marathon race. Since I started taking Epicor about 9 months ago, I haven't contracted any full-blown illness of any kind. My history says I would have had at least 2 colds during this timeframe. Granted, I've felt as though I were about to come down with something a few times, and I just took an extra evening dose for a few days. Certainly this isn't proof of effectiveness, and doesn't rule out placebo effect, but I'm going to continue taking it for now.