can b12 injections cause anxiety What You Need to Know About Vitamin B12 Shots at Home: How,

[2] It is important to note that whilst fatigue and general malaise may improve relatively quickly, complete symptom resolution requires adequate time for the body to replenish B12 stores and repair affected tissues

5 Aftercare You may experience mild soreness at the injection site but can resume normal activities immediately

Always work with your healthcare provider on testing and treatment decisions.

The severity and duration of deficiency are perhaps the most significant factors

A trained professional knows the correct technique, including using the right needle to ensure the injection is as comfortable and effective as possible