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Why an Injection
Although some of the supplement doses are very high (for instance, 500 or 1,000 micrograms when a healthy adult only needs 2.4 micrograms per day), your body only absorbs what it needs and pees the rest out
Your GP may need to check for co-existing deficiencies (folate, iron, vitamin D) or investigate alternative causes for your symptoms
Most pass in hours or a few days
[DOI] [PMC free article] [PubMed] [Google Scholar] 193.Arch JR, Ainsworth AT, Cawthorne MA, et al
Its distribution in the UK falls into a gray market, raising documented concerns about purity, composition, and supplier quality control
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