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Individuals following strict vegan or vegetarian diet are also at a higher risk of B12 deficiency because plant-based diets typically lack sufficient B12

The table below distills the mechanism, evidence, and regulatory differences covered throughout this guide into a single reference point

Oral administration is more convenient for daily dosing and avoids additional injection sites beyond the weekly tirzepatide shot

It is commonly administered as an intramuscular injection, especially when a deficiency is severe or caused by absorption issues

Individuals who prefer quick, single-nutrient appointments lasting only a few minutes