Description Methionine and Choline Deficient L-Amino Acid Diet. Used in Research NAFLD Packaging Product is packed in 2.5 kg aluminium foil bag. Each bag is identifiedwith the product name, description, lot number and expiration date. Lead Time 5-7 business days. Gamma-Irradiation Yes. Add 3 days to delivery time. Form Pellet, Powder Shelf Life Most diets require storage in a cool dry environment. Stored correctly they should last 6 months. Because of the high fat content is best ifkept frozen.