For patients whose levels fall in the borderline or gray zone, a methylmalonic acid (MMA) test provides greater specificity MMA levels rise when B12 is functionally inadequate at the cellular level, even if serum B12 appears borderline normal
Glycemic control: In type 2 diabetes patients, HbA1c dropped by 1.32.0% (from ~8.0% to ~6.0%) with 412 mg doses [1]
It is not a drug, food, cosmetic, or dietary supplement, and has not been evaluated by the FDA
B12 shots bypass GI absorption problems and deliver methylcobalamin (the active form) directly to your cells, making them far superior to oral B12 if you have any digestive issues or take acid-blocking medications
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However, persistent, worsening, or painful neuropathy should be evaluated by a healthcare provider to identify the cause and prevent complications