Bests & Worsts Reviews from Amazon

I've been using this product for 3 weeks, titrating it very slowly to ensure I would not experience any negative side effects. I noticed that shortly after I started using this product, my symptoms of leaky gut and systemic candida increased. Initially I thought maybe it was something that I was eating, but I knew better - I've been on a very strict anti-candida diet and I knew it wasn't anything I had eaten to cause a spike in my symptoms. I finally decided to call NOW Foods to determine where this glutamine is sourced from and where it's manufactured. When I called, they lady said, "It's sourced from non-GMO corn and it's manufactured in either China or Korea, but I'm not really sure....but it's quality checked here in the United States." I was floored. First of all, how do you not know exactly where your product is coming from? Furthermore, how can one expect me to believe they have the highest quality control protocol for their products if they can't tell me where the ingredients are coming from? So, needless to say, I tossed the remainder of the supplement away. I don't know how long it will take for product to be completely cleared of my body, but I will no longer purchase products from NOW Foods. Too many risks with added metals, etc., that could potentially make my delicate digestive system even worse.