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
doi: 10.1111/dme.12169 8 BellDS
To learn more about this report, North Americas dominance in the global anti-obesity drug market with an estimated share of 38.3% in 2026 stems from a well-established healthcare infrastructure, strong pharmaceutical industry presence, and comprehensive government policies supporting obesity management
Drug Compounding: What is it and why do we need it
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In contrast to the findings of Cooper et al