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That is far weaker than a Phase 1 human trial

Allergic reactions to proprietary preparations of vitamin B12 might be due to substances added to the solutions as preservatives or for other reasons, to impurities from the production, or to the vitamin B12 itself

A 2021 analytical study developed and validated an LC-MS/MS method to measure 5-amino-1-methylquinolinium in rat plasma and urine

Why Choose REVIV for Vitamin B12 Therapy

Theoretical concerns are not proof of harm, but they identify areas off-target SAM effects, signalling-pathway impacts, and uncharacterised interactions that require study before any conclusion about human safety could be drawn

As a result, those who are vegan or vegetarian have a risk of being deficient in vitamin B12