That sucks.
But it IS solvable, if a restaurant’s goal wasnt purely to earn the most money possible, I would think. Maybe not on-demand but if they knew you’d be eating daily (subscribtion?) then having a slower no-contaminant part of a kitchen making dietary-different meals would be a nice addition.
Im no physician, I dont know.
My chiropractor made a small suggestion that a walk in the forest could help, and I discarded it because I was already “walking in the forest” a lot. Except I kept to the well-trodden paths. And I walked on asphalt to get to the forest. And it didnt really help. And the exercises he told me to do at home didnt really do much.