where's the best place to inject b12 How Administer an Intramuscular Injection at Home B12 Shots vs. IV Infusions:

Enhances Metabolism Vitamin B12 is vital for the proper functioning of enzymes involved in metabolism

If you're in a risk group reduced food intake on GLP-1s, plant-based diet, long-term metformin or PPI use, over 50 and fatigue is dragging you down, checking your B12 is one of the highest-ROI moves you can make

As B12 is a water-soluble vitamin, it's generally considered safe (because any not used will be excreted via your urine), but even so you shouldn't take more than the recommended doses unless recommended to do so by your GP, as some studies have shown possible negative impacts of overdoing it

Gastrointestinal Symptoms: Common side effects include nausea, vomiting, diarrhea, and abdominal discomfort