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Here is a straight, evidence-based answer, so you can decide whether B12 shots make sense for you

The combination therapy significantly slowed tumor growth and prolonged the life span of tumor-bearing mice more than monotherapy
J., Li, H., Kim, M., DAgati, V

Studies Highlighting Glutathione Benefits: A study published in the demonstrated that Glutathione supplementation improved immune function and reduced oxidative stress, providing overall health benefits
