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Can B12 injections cause a serious allergic reaction
Overdoing it can occasionally lead to side effects like nerve irritation (with too much B6), skin flushing (from high-dose B3), or digestive upset
Serum B12 reference ranges vary between laboratories, but generally, levels below 148 pmol/L are considered deficient, whilst levels between 148258 pmol/L are regarded as borderline and may warrant further investigation or a trial of treatment, particularly if symptoms are present
They also help regulate sleep cycles, reducing insomnia and promoting more restful sleep
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