what size needle to give b12 injections for a Injection: A Simple Guide Vitamin B12 Injection Dosage for

However, you should: Call 999 or go to A&E immediately if you experience signs of a severe allergic reaction (difficulty breathing, severe throat/facial swelling, or collapse) Contact your GP if you experience a rash, itching, persistent pain at the injection site, or worsening neurological symptoms despite treatment If you suspect any side effects from your B12 injections, you can report them through the MHRA Yellow Card scheme (yellowcard.mhra.gov.uk)

Elevated plasma vitamin B12 levels as a marker for cancer: a population-based cohort study

Journal of Medicinal Chemistry , 61(15), 64156425

That means: Vegetarians and vegans are at higher risk

For one, you may experience mild side effects during your treatment, such as tenderness at the injection site and a mild headache