Contact your GP urgently if you experience severe pain, signs of infection (increasing redness, warmth, discharge), or any concerning symptoms following injection
When exploring methods to successfully biohack your life, like all other care options, its necessary to evaluate what is the source of the problem that needs to be targeted and what is the best and most reliable way to do so
Frequency: Once to twice per week, depending on activity level and therapeutic intent
Berlin, Heidelberg: Springer Berlin Heidelberg: 1522
Improved Metabolism: B12 injections support the bodys metabolic processes, aiding in the breakdown of fats and proteins for energy

You should contact your GP if: You have been found to have elevated B12 levels on blood tests, particularly if levels exceed 1000 ng/L (approximately 740 pmol/L, though laboratory reference ranges vary) and you are not taking high-dose supplements You develop new symptoms after starting B12 supplementation, including persistent skin rashes, significant gastrointestinal disturbance, or unexplained symptoms You have underlying liver disease, kidney problems, or blood disorders and are considering B12 supplementation You are taking B12 supplements without medical supervision and have not had your levels checked, particularly if taking doses exceeding 2000 micrograms daily You experience symptoms that might indicate underlying disease, such as unexplained weight loss, persistent fatigue, jaundice, or abdominal swelling Call 999 or go to A&E if you develop severe allergic reactions following B12 injections, including difficulty breathing, facial swelling, or widespread rash, as these may indicate anaphylaxis, though this is extremely rare
