I am currently tandem nursing. I am currently avoiding 13 different things (it is technically more, but I count them as groups, stone fruits, potatoes, etc).
3 foods are for me
6 foods for my older nursling
4 for the younger
My youngest probably has some of the same allergies as me and DD2, but since she is ebf, we won't know for a while yet. Formula would more or less kill my kids. It is a great thing we do when we limit ourselves for our children's good.