when do you need b12 injections Vitamin Injection Dosage Best Vitamin B12 Injection Sites:

BNF guidance on treating b12 deficiency changed recently

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Basically a study looked at 100 drugs & found that 90% of them were fully potent 15 years after their expiration date, though that may vary by drug, and perhaps liquid forms are a bit more vulnerable (perhaps)

Another option is to start taking B12 supplements, which usually have megadoses of the vitamin

I trust the Pure Encapsulations brand for quality and ingredients

Vitamin injections may help support energy, metabolism, recovery, immune function, detoxification, and nutrient replenishment