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Oral Supplements: A Quick Comparison For people with a confirmed deficiency, especially those with absorption problems, injections generally act faster than oral supplements: Injections: bypass the gut, reliably reach the bloodstream, and often produce noticeable changes in energy and mental clarity within days for those who are deficient
Helps me get moving
Frontiers in Pharmacology
Intramuscular (IM) Injections: Intramuscular injections deliver B12 directly into muscle tissue, typically in the vastus lateralis (outer thigh) or deltoid (upper arm)
Some patients may be trained to manage their own injections at home, but this should only be done with proper instruction and supervision
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