I am a regular customer and never paid or been solicited to offer reviews. I have loved this for at least 15 years and recommend it widely for liver repair & restoration and lung health. My son recovered from fatty Liver disease in 3-4 mos. and lost a needed 30 lbs with this alone and no other diet changes about 13 yrs ago. I also order it for my son and his wife (and for others). We have NEVER had any of the "spotting" problems that are being reported. I am very sensitive to mold so that would be an important issue to me- but this spotting would be, if happening, oxidation issues-not mold.. There should be a slight sulfur smell to it as it is a component in the formulation of glutathione produced by the liver. (Sulfur is the reason MSM is so effective as well as a precursor to this process.) The bottle I am using now has been in my plastic set of supplement drawers in my kitchen since AT Least since July 2018...but not sure as I might have placed that order for my son so this could be older. The expiration date on this bottle is 5/2022. I am the only one using it at 1 cap /day so I expect it will continue to be fine probably for another 7-8 mos as my other bottles have been. I do not live in a dry climate, but in OR in the rainy Willamette Valley