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For severe deficiency, clinicians typically prescribe loading doses daily or every other day for one to two weeks followed by monthly maintenance injections
The enzyme also keeps mitochondria efficient and helps it perform under stress
Quality varies significantly between sources, and independent testing for purity and potency is not consistently available
The water amount changes the concentration and syringe units, so it must be recorded with the vial size
So, the route of administration matters
"Oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency: a systematic review of randomized controlled trials"
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