my baby is 4 yrs old can you suggest any diet plan to improve immune system & strength

A. You can give saffron and turmeric milk every day you can I dry foods into that that’s one of the best home remedies to increase immunity along with that it is going to be good if you can go ahead with giving more of fibre rich diet seasonal fruits and vegetables avoid giving junk food and packaged food to the child that’s going to be helpful and multivitamin supplement and iron supplement regularly