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If your body doesnt have enough B12, you may experience symptoms such as fatigue, weakness, or even anemia

doi:10.3390/jcm13082176

[114] This functionality is lost in vitamin B 12 deficiency, and can be measured clinically as an increased serum methylmalonic acid (MMA) concentration

Be patient the first 1-2 weeks as your levels build

Subcutaneous (SC) Injections: Subcutaneous injections are administered just beneath the skin into the fatty tissue, usually in the abdomen or upper arm

These shots are delivered directly into the bloodstream which bypasses the gastrointestinal system and ensures that the body gets a sufficient amount of vitamin B12 stores to function optimally