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Untreated vitamin B12 deficiencies can lead to neurological issues or pernicious anemia which can occur when your body does not have enough vitamin B12 to produce the amount of red blood cells it needs
Spacing them by several hours eliminates this minor concern
8 Bruising is Rare But Can Happen Most of the time, the injection will cause no bruising
If you feel worse before you feel better, dont be discouraged
In Japan, ALS patients received B12 shots of 25,000-50,000mcg (each shot equal to 25-50 pernicious anemia shots all at once), at first daily and then twice a week
Sources: U.S
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