deep muscle b12 injection How to self-inject intramuscular vitamin - Overview Best Vitamin B12 Injection Sites:

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doi: 10.1111/j.1469-7580.2008.00860.x, 22

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Fortunately, there is increasing evidence that oral B12 supplements are just as good as injections for raising blood levels in most people ( Vegetarians and vegans are usually advised to take at least 10 mcg per day, or at least 2,000 mcg once per week ( However, some doctors still prefer the use of injections

Chan CQH et al, "Oral vitamin B12 replacement for the treatment of pernicious anemia." Frontiers in Medicine, Aug

It induces a high-oxidative state in skeletal muscle, effectively "tricking" the body into simulating the systemic benefits of endurance training