Bests & Worsts Reviews from Amazon

I originally posted a review saying I was also getting mold spots. But I actually bothered to contact the company. After reading their response I have upped my review to four stars. Here is what they had to say: Last year NOW switched to new vegan based NAC raw material that consists of selenium and molybdenum compounds. These capsules are more prone to speckle under certain conditions.  Over time when kept in a humid environment, such as a kitchen or bathroom black spots may appear in NAC. This is a normal oxidative reaction among the ingredients, but the product is safe to consume. These spots are NOT mold or any other micro-contamination. Micro-testing has been performed to assess product safety. To slow down this process, please either refrigerate or freeze the bottle.