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Pregnancy and Breastfeeding : If you are pregnant or breastfeeding, consult your healthcare provider before using Vitamin B12 injections

They may have underreported minor discomforts that did not meet thresholds for adverse event classification

If supplement-related

This routes the nutrient directly into the bloodstream without an intermediary tissue depot

This is a separate and still investigational line of research rather than an established use, and it should not be confused with the fat-loss mechanism that the bulk of the clinical work has focused on

Electrocardiogram monitoring revealed no cardiac conduction abnormalities or other cardiovascular concerns