Dr.Clark's N-Acetyl-Cysteine (NAC) - 575 mg, Non-GMO, Gluten-Free NAC Supplement with Selenium and Molybdenum for Respiratory Support, 100 Easy Swallow Gelatin Capsules

Given their history and what the company was founded upon, I found this brand to be a much safer and healthier option for vitamins / herbs. The VeriGMP stamp in addition to not using these toxic fillers (like 99% of other companies do) is why I swapped over to this brand. From my understanding these are also tested for contaminants. I encourage everyone to do their research beforehand. Majority of other vitamin companies are not to be trusted. The proof is the various fillers (many) which can be found on the back of the bottle. Also the other contaminants and metals that are most likely in there.I have been using this brand (ordering from both their site and amazon) and haven’t looked back. Prices are good but more importantly the quality can be trusted.

Those of us who are gluten and casein sensitive due to the yeast in the Hep-B shot, will likely have a reaction to this product. The sad thing is it's entirely unnecessary. I take NAC twice a day and never react to it like I did with Dr. Clark's NAC.

The Dr. Clark store products are of excellent quality, without all the additives and preservatives we avoid . We have used them for years. We are very pleased with this product as well.