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A 2024 study published in the Proceedings of the Nutrition Society found deficiency prevalence ranges from 5 to 52% in vegans and 6 to 14% in vegetarians, depending on supplement use
This quick response occurs because the vitamin is rapidly absorbed into the bloodstream, offering fast relief from fatigue or brain fog, especially for those with deficiencies
People who take medications regularly that decrease stomach acid production can also become deficient in vitamin B12 for this reason, whether they consume enough from their diets or not
Injectable Protocol (Most Common) Standard Dosing: Dose: 50 to 100 mg per injection Frequency: Once daily Administration: Subcutaneous (under the skin) Duration: 8 to 12 weeks Injection site: Abdomen or thigh The injectable form provides consistent blood levels and is the form used in most research studies
A slow injection helps minimize pain and promotes proper delivery of the medication
