 Allergic diseases are becoming increasingly prevalent and severe in developed countries, and feed allergies are among the most common. The immune response involves numerous cell types and populations, which can sometimes be disrupted, leading to different diseases such as allergies. Antihistamines and corticosteroids provide relief from symptoms, but immunotherapy is the only treatment that can reverse the disease. However, specific immunotherapy has drawbacks such as being time consuming and producing side effects. Adjuvants like nanoparticles are being explored to reduce these side effects in preclinical assays. This article was authored by Carlos Gamazo, Carmen D'Amelio, Gabriel Gastamenza, and others.