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Because this is rare but potentially life-threatening, injections are best given in settings with trained staff and emergency treatment available
After that, you need one every month
You will get to know the importance, deficiency symptoms, manufacturing, storage and something more about this injection, which will benefit you for the lifetime
Water-soluble vitamins, such as B12 and C, are more likely to lose their potency quickly
When B12 levels become problematic: High-dose supplementation (particularly doses exceeding 1,000 micrograms daily) Frequent B12 injections without medical supervision Underlying conditions affecting B12 metabolism Concurrent use of multiple B12-containing supplements The NHS does not set an upper safe limit for vitamin B12 because harmful effects from excessive intake have not been definitively established