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Second step is to ensure the observation by carrying out the laboratory tests
"5-deoxyadenosylcobalamin and methylcobalamin as sources for Vitamin B 12 added as a nutritional substance in food supplements: Scientific opinion of the Scientific Panel on Food Additives and Nutrient Sources added to food"
Although approximately 30% of vitamin B12 is lost during cooking, red meat derived B12 has both the highest quantity in food AND the highest bioavailability (amount absorbed) with up to 90% absorbed in the small intestine (7, 8)
If you are deficient on labs it is typically recommended to complete 4-6 injections and then retest levels
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