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Who Is Most at Risk of Vitamin B12 Deficiency Certain groups face a meaningfully higher risk

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Monitoring-guided supplementation is the usual approach, typically beginning with oral supplementation if blood tests indicate suboptimal levels, and escalating to IM injection if oral treatment is insufficient or poorly tolerated

However, the general consensus has been that people who have used out of date ampoules - and there are several of us - and various scientists on the group, suggest that glass ampoules are a biologically safe way of storing the fluid and will stop pathogens getting in