Set Realistic Expectations Be clear with your patients about what they can expect from each option
If irritation is persistent or severe, reducing dose or frequency may help
While B12 is available in oral supplements, absorption can vary greatly
(1994) A controlled trial of cyanocobalamin (vitamin B12) in the treatment of winter seasonal affective disorder
From a scientific perspective, the next critical step would be rigorous, independent, international clinical trials with proper controls, blinding, and standardized outcome measures
Glass capsule (ampoule) of vitamin B12 Purple needle for drawing up B12 Cleaning wipes (containing alcohol) Clean gauze or cotton wool Sharps bin Instructions Preparation Step 1 Wash your hands with soap and warm water