can i inject myself with b12 Shots at Home: How, Where & How Often to Yourself B12 Injections at Home -

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Although research remains at the preclinical animal stage, the product has become an important tool for dissecting glucose metabolism disorders and diabetes and developing novel hypoglycemic agents, with its key advantage lying in nicotinamide pathway regulation and NAD+ stabilization

The process involves: Dissolution in the stomach Binding to intrinsic factor Absorption in the ileum (small intestine) Transport through bloodstream to tissues With proper oral B12 dosage, supplementation can gradually restore normal levels, especially in cases of dietary deficiency

For reference, this is substantially higher than the equivalent human doses typically used

If the cause isn't dietary then it is an absorption problem so you need to find another way of replenishing B12 initially