Adverse reactions after a B12 injection may include: A feeling of tightness in the chest Anaphylaxis (difficulty breathing or swallowing) Chest pain Congestive heart failure Heart palpitations Pulmonary edema Rapid heartbeat (tachycardia) Shortness of breath Vascular thrombosis Musculoskeletal Effects Your musculoskeletal system makes up your bones, tendons, cartilage, and connective tissues
Vitamin B12 is found naturally in various food sources, including animal products like meat, fish, poultry, eggs, milk, and milk products ( Its also added to many fortified foods, such as breakfast cereals and plant-based milk like almond, soy, or hemp milk ( Vitamin B12 supplements are also available in several forms, including tablets, capsules, liquids, and lozenges
The most common side effects with topical use include mild redness, temporary stinging at application site, and initial purging (worsened appearance before improvement)
Patience and consistency are key