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Telling your doctor about the color, consistency, and how often you have stools is crucial for a good check-up
Rare but serious adverse effects include pancreatitis (though causality remains uncertain), gallbladder disease, and potential thyroid C-cell tumors (observed in rodent studies but not conclusively demonstrated in humans)
American Journal of Clinical Nutrition , 71(5), 1257S1266S
Side effects and cautions B12 has no established upper limit due to low toxicity, but injections can have side effects: Common: soreness, redness or swelling at the injection site
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