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Across hundreds of animal studies, serious adverse effects have not been commonly reported
Alcohol stings if the needle passes through wet alcohol into the skin
The vitamin B12 forms cyanocobalamin and occasionally hydroxocobalamin can be administered by intramuscular injection to treat deficiency or cases of malabsorption
Monitor factors that might affect absorption: oral pH, hydration level, time of day, position of drops under tongue
Cobalamin deficiencies or a lack of Vitamin B12 can also lead to issues such as anemia or the feeling of fatigue and cognitive problems in most people
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