[Kalamata]

I have not heard this before. I take NAC (Swansons). I looked on the bottle and it does not say to refrigerate it. Maybe different NAC products carry different storage instructions?

[PA Engineer]

The LEF version goes bad in a couple of months unless refrigerated. We keep it around specifically for influenza. NAC is also used for those that wash down acetaminophen with alcohol. Hospitals keep it in stock.

When it goes bad it begins to smell like vinegar. With influenza, the sooner you begin taking it the better. There is one other interesting nutraceutical that is being researched right now related to the Vanins metabolic pathways. That is all I can say at this time.