Injections, on the other hand, provide high bioavailability and typically result in faster improvement of symptoms Injections may be a better choice if: Youve been diagnosed with a B12 deficiency You follow a vegetarian or vegan diet You take medications that impair absorption You want faster, more noticeable results Ideal B12 Injection Dosage & Frequency Theres no one-size-fits-all dosage for B12 injections
Nevertheless, exenatide was shown to dampen alcohol-related cue reactivity in the ventral striatum, as measured by fMRI, and was associated with lower dopamine transporter levels (Klausen et al., 2022)
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However, larger trials and observational studies have not confirmed a clear causal relationship
Accessed February 23, 2026