Vitamin B12 supplements are useful for preventing B12 deficiency and its related symptoms
Mood disturbances including irritability, depression, or unusual anxiety
signs of an allergy may include rash, hives, itching, or even anaphylaxis (a severe allergic response) in highly sensitive individuals
While some promote B12 shots for weight loss, the evidence is far from conclusive
Neurological Symptoms Several Weeks to Months If you have tingling, numbness in your hands or feet, or balance problems caused by B12 deficiency, these symptoms take longer to improve
Cobalamin has notably been shown to act as an antioxidant, suppress cytokine production, and regulate NO synthase activity [18,19,20]