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Low vitamin B12 levels cause a reduction in red blood cell formation and prevent them from developing properly

Without testing, there is no way to distinguish between B12 deficiency and other causes of similar symptoms, no way to determine the severity of deficiency, and no way to select the most appropriate delivery method

The MHRA recommends considering periodic B12 monitoring in patients on metformin who have risk factors for deficiency, and testing if symptoms develop

The therapeutic window appears narrow

As with all supplements, please be sure to consult with your healthcare practitioner to determine the dosage and duration that is right for you, and to ensure they do not interact with any other supplements or medications that you may currently be taking