Risks and Side Effects Potential Side Effects While vitamin B12 injections are generally considered safe, they can cause side effects in some individuals
Pitsikas, 2024), including in the seat of fear learning: the amygdala (Forestiero et al., 2006)
Have both in the same body and ferritin may look completely normal
A lack of protein in your diet can cause side effects/symptoms, including muscle weakness or muscle wasting, loss of concentration, weight gain or weight loss (depending on if body fat is increased), anxiety, joint discomfort, and trouble sleeping
Proper injection techniques and sterile conditions help reduce these risks