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8,9 Table 1 Risk Factors for Vitamin B12 Deficiency A multicenter randomized controlled trial of 390 patients with diabetes mellitus showed that those taking 850 mg of metformin three times per day had an increased risk of vitamin B 12 deficiency (number needed to harm = 14 per 4.3 years) and low vitamin B 12 levels (number needed to harm = 9 per 4.3 years) vs
The lower concentration spreads the dose range across more syringe units, giving finer control during titration
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The NHS does not set an upper safe limit for B12 because harmful effects from excessive intake have not been definitively established
Its crucial for energy production, red blood cell formation, nervous system function, and DNA synthesis
Typical Dosage Range Most users find effective results between 0.25 mg and 1 mg per day , with 0.5 mg emerging as the clinical sweet spot for fat loss and tolerability
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