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Without this factor, vitamin B12 cannot be absorbed even if the anatomy is intact

To avoid the need to replace entire stockpiles every few years at significant expense, and because it was recognized through testing that certain products remained stable beyond their labeled expiration dates when properly stored, the Shelf-Life Extension Program (SLEP) was established in 1986

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Suppression of the macrophage proteasome by ethanol impairs MHC class I antigen processing and presentation