b12 booster injection side effects Feeling worse after Injection: Answering concerns B12 Shots: Vitamin B12 Injections
Description
It does not suddenly become poisonousjust less effective: Properly stored vitamins are likely safe past their expiration date for up to two years

Do not repeat injections daily without medical supervision

Gastric or bariatric surgery : Patients who have undergone weight loss surgeries such as gastric or bariatric surgery may experience B12 deficiency due to the unavailability of intrinsic factor after gastric or intestinal resection

This will burn away as the liquid injected settles down
