Test whether antibodies relate to food reaction symptoms

This study looks at a specific immune signal (C5a/C5aR1) in IgG4-related disease to see if blocking that signal could be a future treatment. It compares blood samples from people with active disease, people in remission, and healthy volunteers.

This study looks at whether a specific immune signal (IgE) found in the gut lining can help diagnose food allergy or food-related hypersensitivity. You may join if you have symptoms that suggest a food allergy, or (if you’re healthy) if you need endoscopy for other reasons.

This study checks whether a new blood test can measure allergy-related immune signals (IgE) in people with known or suspected allergies. If it works well, it could help doctors diagnose and track IgE allergies more easily.

This study looks for the biological reasons behind food allergies by collecting a small amount of blood. It may help scientists better understand different types of food allergy and eventually improve diagnosis or treatments.

This trial tests a new medication called RPT904 in people with IgE-mediated food allergies to foods like peanut, milk, egg, cashew, or walnut. The goal is to see if it reduces allergic reactions when you eat a small amount of the food.

This study looks for blood test patterns that may predict whether a child with eczema (atopic dermatitis) is likely to have a food allergy. If you join, you may do supervised oral food challenges with a placebo and the suspected foods to see what triggers symptoms.