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The intramuscular method helps B12 absorb slowly

1 2 "Nutrients: Vitamin B-12" (PDF)

If you have malabsorption syndrome (such as short bowel syndrome, certain bariatric surgery patients, chronic pancreatitis, or celiac disease that severely impairs nutrient uptake), you might need these injections indefinitely to prevent recurrent deficiencies

Severe deficiency : Weekly or biweekly injections may initially be required to correct anemia and neurological symptoms

These studies demonstrate that the product mitigates the pathological progression of NAFLD by regulating adipose and hepatic metabolism, providing a valuable tool for understanding NAFLD pathogenesis and new strategies for intervention

How bad the rash is depends on how much vitamin B you take in