Vitamin AD can be taken for milk protein allergy, which is caused by the body’s perception of milk protein as an antigen, which activates its own immune system and produces specific antibodies, which do not recognize themselves correctly, thus causing immune damage and an allergic reaction. Vitamin AD is a vitamin compound, which does not contain proteins and does not activate the immune system, causing an immune response and immune damage. Therefore, it can be used normally. To avoid anaphylactic reactions, you need to avoid contact with or consumption of milk and proteins, and only by controlling the allergens can you effectively prevent anaphylactic reactions from occurring.