inject b12 into vein Shots vs. IV Infusions: What is the difference? Best Vitamin B12 Injection Site:
Description
Research also suggests that high homocysteine levels may affect the blood-brain barrier, contribute to the build-ups of amyloid plaques (in Alzheimers disease), reduce bone density, impair correct functioning of insulin and even promote cancer cell division (Kumar et al., 2017)

MIC injections have neither

Source: O'Leary, F., & Samman, S

What are the benefits of B12 injections
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Heat can quietly reduce effectiveness, even if the ampoule or vial looks fine
