Many national campaigns have tried to change this

Assessment considerations include: Serum B12 measurement may be considered before initiating Ozempic in high-risk patients (those on metformin, older adults, those with gastrointestinal symptoms, or with restricted diets) Testing for B12 deficiency should be performed in patients on metformin who develop symptoms suggestive of deficiency, as advised by the MHRA Drug Safety Update Consider periodic monitoring in patients with risk factors for B12 deficiency, rather than routine annual testing for all patients Full blood count to identify macrocytic anaemia, which may indicate B12 or folate deficiency Clinical assessment for symptoms of deficiency: fatigue, paraesthesia, cognitive changes, glossitis, or balance problems If B12 levels are borderline or if clinical suspicion remains despite normal serum B12 (measured in pmol/L, with laboratory-specific reference ranges), additional testing may be considered according to local laboratory protocols

Bioavailability refers to the amount of a nutrient that actually makes it into your bloodstream and reaches your cells
Preclinical and preliminary clinical evidence of semaglutides potential beneficial effects in various substance use disorders led us to evaluate if it could extend to CUD