How to Administer a B12 injection to Yourself There are two ways to self-inject vitamin B12: Subcutaneously, or just below the skin, and intramuscularly, which goes directly into the muscle, says Foxx
The Long-Term Timeline: 2 to 3 Months and Beyond The most lasting benefits are structural and take time, especially where the nervous system is concerned
Your GP may arrange periodic blood tests to ensure B12 levels remain adequate, though clinical response is generally more important than specific blood values once treatment is established
Results vary, but many people report more energy, better focus, and improved mood after just a few treatments
Treating a B12 deficiency may boost energy and mood, reduce stress and fatigue, and decrease symptoms of multiple conditions