19 Things Most Metformin Users Are Never Told — Including What It May Be Doing to Your B12 Levels, Liver, and Gut

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If you’ve been prescribed metformin for blood sugar management, you likely know it’s one of the most commonly used medications of its kind. But many people taking it long-term discover there’s more to the story than the basic instructions that come with the prescription.

Doctors and researchers have shared insights over the years about how this medication interacts with your body in ways that often go undiscussed during quick office visits. From subtle changes in nutrient absorption to effects on