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If you reconstitute a 30 mg vial with sterile water and plan to draw doses over several weeks, you are creating a contamination risk that increases with every injection

Which site is best for a B12 injection

Btw I always look forward to my treatment days

The FDA also notes that 28 days is the assumed opened-vial period for this kind of container unless the label specifies something else

While our bodies can store B12 for years, some groups are more susceptible to deficiency, often because of absorption issues rather than diet

But even this doesnt always give a clearcut answer on whether there is a B12 deficiency Two secondary tests measure B12 function The secondary tests that measure how well B12 functions in the cells, are called functional tests