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Its primary source is found in food products of animal origin, including meat, milk, eggs, and more
Side effects and safety considerations Most side effects are mild
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This mechanism is not fully elucidated and it is possible that it acts via the IGF-1 receptor (not GHR) in localized concentrations
One cause of B12 deficiency includes pernicious anemia, a condition that results in a reduction of red blood cells when the intestines cannot absorb enough vitamin B12
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