What is the shelf life of the flaxseed hulls (lignans)?

Our flaxseed hulls have a shelf life in excess of 3 years. The actual shelf life is much longer, but we list 2 years from the manufacture date on the bottles to be conservative. You do not need to refrigerate our flaxseed hulls. This is different than whole flaxseed. Whole flaxseed can last many years without refrigeration until you grind it. Once you expose the embryo to the air, you must refrigerate it, and even then the shelf life is only 1 year. This is one of the many reasons our flaxseed lignans are preferred over regular flaxseed.