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Frequently Asked Questions Oral supplements must pass through the digestive system, where nutrient absorption can be inconsistent and limited
For some people, especially those with certain genetic variations like the MTHFR mutation, converting cyanocobalamin can be a challenge
Some common side effects may include: Irritation at the injection site Fatigue Nausea Storage Store at controlled room temperature
Typical daily intake targets are about 600 IU per day for most adults, and 800 IU per day after age 70
The typical IM sites are the deltoid muscle (upper arm) or the gluteal muscle (buttock)
Paolella, L
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