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Another option for vitamin B12 supply, which is given in particular in the case of a clinically manifest deficiency, is the parenteral form or vitamin B12 injections

A 2025 IRB-approved pilot study published in PubMed reported no adverse effects following intravenous administration of 20mg in 2 healthy adults, with monitored biomarkers (heart, liver, kidneys, thyroid, and blood glucose) returning normal results

Vitamin B12, a water-soluble vitamin, is central to metabolism

Weekly Injection Semaglutide / Tirzepatide A fit for patients who want a longer-building medication, need sustained appetite control, or may benefit from adding a second tool later in treatment