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Unlike oral B12 supplements, which depend on intrinsic factor production in the stomach for absorption and lose 5070% bioavailability in the digestive process, injectable B12 achieves near-100% bioavailability by delivering the vitamin directly into circulation

Regular retesting intervals allow for treatment optimization and ensure that therapeutic blood levels are maintained over time

If you're a strict vegetarian or vegan, you're at higher risk of B12 deficiency since plant-based foods don't naturally have B12