5-day trial is not a sufficient amount of time for an in-depth evaluation. That being said, I didn't get ill from the product nor while taking the product. In reviewing the website, I believe that it contains a sufficient amount of quality ingredients to build one's immune system. I only wish that the product was less expensive as then I would more seriously consider a subscription. As one who's closet is full of vitamins, herbs and immunity support supplements, I do know how expensive are qu...Read more.