side effects of too much vitamin b12 injections Are Shots Safe? Royal Palm Beach Medical Group B12 deficiency symptoms and why

According to the 2025 meta-analysis by Alfalasi and colleagues, sublingual B12 showed an approximate 199% mean increase in serum B12 compared to approximately 307% for intramuscular injections

An incorrectly administered intramuscular injection can lead to severe pain, nerve damage, and long-term health complications

The MHRA advises checking B12 levels in patients taking metformin who develop symptoms of deficiency or have risk factors, with periodic monitoring in at-risk patients

Beyond the temporary detox symptoms linked to B12, there are a few potential side effects to keep on your radar: Discomfort, discoloration, or bruising at the point of injection

Yes, you absolutely can

Each vitamin plays a unique and irreplaceable role in the body: Vitamin B6 : This vitamin is essential for protein metabolism, the production of neurotransmitters such as serotonin and dopamine, and the synthesis of hemoglobin , which is crucial for oxygen transport in the blood