Some examples of foods that are high in vitamin B12 are: meat, especially beef, chicken and animal liver fish and shellfish, especially tuna, sardines and clams dairy, such as milk, cheese and yoghurt eggs breakfast cereal fortified with vitamin B12 Vitamin B12 is not naturally found in fruit, vegetables and grains
doi:10.2165/00002512-200623100-00003
This delivery method is pain-free, as the short needle avoids major blood vessels
Results can otherwise be very misleading, as B12 that has not yet been metabolised elevates the blood level
Intramuscular injections are touted as being easier to administer than intravenous, partly because of the easy access of the thigh muscles
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