Allergic to Black Walnut, what can I do?

I have severe food allergies because of my leaky gut. I was told that I would need to do a parasite cleanse to be better. Now the first product my nutritionist wanted me to take had Black-Walnut hull in it. I can't take that. I am terrible allergic to all nuts. He said that there is no other option for me if I can't take this ingredient.

Am I stuck with living on the edge with food allergies all my life now?

Any suggestions out there as to what I can do? It doesn't seems like there is.

Thanks!