Most people tolerate Vitamin B12 injections very well
One individual per group was euthanized before addressing the next animal in each group to render differences arising from the time of day at euthanization (e.g., cecal mass changes resulting from differences in time post-food consumption) comparable across all groups
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Weight loss, when it occurs in individuals receiving these injections, is more likely attributable to concurrent dietary modifications, increased physical activity, or other lifestyle interventions rather than the injections themselves
If you have an itchy feeling in your mouth or throat with your skin rash, talk to your doctor about the need for an EpiPen
People taking B12 alone may not get full benefit if co-nutrient levels remain low