Storage conditions that shorten unopened shelf life: heat (extended exposure above 25C), freezing and re-thawing (can crack the stopper seal), direct sunlight (degrades benzyl alcohol), and humid environments (can degrade label readability and obscure exp date)
These associations were independent of demographic, socioeconomic, lifestyle factors, use of medications that could have an effect on serum vitamin B12 levels, dietary supplement use and fasting time
Feeling Worse After B12 Injections Usually, this phenomenon occurs within the first few weeks of starting with the B12 shots
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This is where direct supplementation becomes a valuable strategy
If you use a well or other private water source, get a professional water analysis ASAP if you notice a change in odor, taste, or appearance of the water