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A B12 injection delivers a concentrated dose of vitamin B12 into the muscle for a fast energy and mood boost, while IV therapy infuses a broader blend of vitamins, minerals, and hydration directly into your bloodstream
Researchers gave participants either a placebo or 1,000 mcg of vitamin B12 daily for eight weeks
Intramuscular injections deliver B12 directly into muscle, which allows it to enter the bloodstream and bypass digestive absorption problems (NIH ODS)
Understanding how it compares to alternatives helps in selecting the right protocol for individual goals
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