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Description
What they did: A Phase 1 clinical trial in Croatia in the 1990s2000s

Effect Duration Onset Time : Vitamin B12 injections can begin working within 24 to 48 hours, whereas oral supplements might take a few days to start showing effects

Trends in peptic ulcer disease and the identification of helicobacter pylori as a causative organism: population based estimates from the US nationwide inpatient sample

Raizen MD, Brooks-Kayal A, Steinkrauss L, et al
