Vitamin injections are medical procedures used to deliver essential vitamins directly into the bloodstream or muscle tissue, ensuring rapid absorption and avoiding the digestive system. The process typically begins with a consultation with a healthcare provider to determine the specific vitamin deficiency and appropriate dosage. Common vitamins administered via injection include B12, vitamin D, and vitamin C. Once the type and amount of vitamin are decided, the healthcare professional prepares the injection site, usually selecting an area with adequate muscle tissue, such as the upper arm (deltoid muscle), thigh, or buttocks. The skin is first cleaned with an antiseptic to reduce the risk of infection.

The actual injection process involves the healthcare provider drawing the correct amount of the vitamin solution into a sterile syringe. The needle is then swiftly inserted into the muscle tissue at a 90-degree angle to ensure deep penetration. Slowly, the vitamin solution is injected into the muscle. After the injection, the needle is carefully removed, and light pressure is applied to the site with a sterile cotton ball or gauze to prevent bleeding. A bandage may be applied if necessary. The patient is usually observed for a few minutes following the procedure to ensure there are no immediate adverse reactions. Follow-up appointments may be scheduled to monitor the patient's response to the vitamin therapy and to administer additional doses if needed.