Autoimmune diseases, including arthritis, diabetes, skin conditions, bowel disease, celiac disease, etc., occur when the body mistakenly attacks itself. We have long-term loyal customers with serious autoimmune diseases such as Crohn's disease, psoriasis, eczema and arthritis who swear by our collagen for immunity building. When considering collagen and your autoimmune disease, we recommend you consult your doctor for any specific medical advice.