Allergies are the immune system’s aggressive response to otherwise harmless particles, like dust, dander or pollen. Life becomes tough for people with chronic allergies because, if left untreated, allergies can get worse over time. They can trigger sinus infections, ear infections, colds and weaken the immune system. A weak immune system can leave you susceptible to infections. A study published in Nature found that prolonged allergy exposure “produces long-term changes in the structure of the affected organs and substantial abnormalities in their function.” Allergy support supplements help with symptoms and support the body's response to allergens.