<b>Laboratory Markers Used for the Diagnoses of Food, Respiratory, Skin, and Drug Allergies</b>

Background: Allergies, as prevalent conditions, significantly impact individuals' health and quality of life. The criticality of accurate diagnosis cannot be overstated, as it is the cornerstone for effective management and treatment, underscoring the gravity of the medical professionals’ work. Objectives: This review aims to provide a comprehensive evaluation of laboratory markers used to diagnose different types of allergies, including food, respiratory, skin, and drug allergies. Methods: The review analyzed and synthesized data from current literature on essential diagnostic tools such as skin prick tests, specific IgE blood tests, and component-resolved diagnostics. Studies comparing these diagnostic methods' efficacy, specificity, and limitations were discussed. Results: Skin prick tests remain widely used for diagnosing immediate-type allergies but may have limitations in detecting all allergens. Specific IgE blood tests offer a more detailed assessment of allergen-specific responses, although they can be influenced by factors such as patient age and coexisting conditions. Component-resolved diagnostics provide enhanced precision by identifying specific allergenic components, potentially improving diagnostic accuracy and guiding targeted immunotherapy. Conclusions: The review underscores the effectiveness of existing diagnostic tools while also highlighting their variability depending on the type of allergy and patient characteristics. The future of allergy diagnosis lies in the integration of advanced technologies, such as component-resolved diagnostics, into clinical practice. This need for further research should instill a sense of urgency and emphasize the importance of efforts to enhance patient outcomes and optimize allergy management strategies.