Improved Mood and Cognitive Function Vitamin B12 supports brain health by assisting in the production of neurotransmitters like serotonin and dopamine, which regulate mood and emotional well-being

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

some patients experience numbness and tingling as a result of the procedure
These signs include: Less fatigue and more energy Neurological symptoms like numbness or tingling getting better Brain function getting sharper Gastrointestinal problems getting better Clinical improvement often comes before lab results show big changes
For most pain types, BPC-157 is the best choice