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The first dose is usually 1000 mcg (1 mg)
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Six controlled trials in approximately 900 participants are summarized in Stier et al
Before using this medication, speak with your doctor or pharmacist about your medical history, especially of low potassium, gout, blood disorders (polycythemia vera), eye disorders (Lebers disease), or other vitamin or mineral deficiencies
But there is also a tiny little bit of B12 that can be absorbed without intrinsic factor
This article examines what the science and UK clinical guidance actually say about B12 supplementation and weight loss, identifies who genuinely needs B12 supplementation, outlines safe dosage according to NHS and BNF recommendations, and sets out the evidence-based weight management strategies endorsed by NICE
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