It's important to avoid any allergens so you don't get inflammation this makes your gut leaky. Try to eat nutritious foods to keep your immune system and body able to repair itself. I think of it like this People in countries where they are literally starving to death are loaded with parasites so they will thrive no matter what. It's all about your immune system being able to fight them off and it starts in your gut. You have to have enough bile, hcl and digestive enzymes to keep them at bay. You need amino acids to repair tissues and vitamin c and d to boost immunity.