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Description
Each injectable IV product will have the osmolarity listed on the label located on the vial

High serum cobalamin levels in the clinical settingClinical associations and holo-transcobalamin changes

Working with commercial organisations : to explore other forms of delivery which do not involve the use of a needle, but which still by-pass the digestive route (where the foundation of the problem lies) and resolve symptoms
Foods like meat, fish, dairy products, and fortified cereals are good sources