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B12 injections tend to be most useful for: Patients on GLP-1 medications (semaglutide, tirzepatide) who feel fatigue in early weeks Patients with low energy, brain fog, or mood symptoms Vegetarians or vegans (plant foods don't contain B12) Adults over 50 (B12 absorption drops with age) Patients who've had digestive surgeries (bariatric, gallbladder) that affect absorption They're generally safe B12 is water-soluble, so your body excretes what it doesn't use
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For accurate dosing in your research, a U-100 insulin syringe (typically 1mL, 0.5mL, or 0.3mL) is the standard as its unit markings allow for precise, small-volume measurements
A rare cause is transcobalamin II deficiency, a genetic condition where your body can't transport B12 (also known as cobalamin) in your body
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Researchers must understand that this compound is investigational and not FDA approved for any medical indication
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