David NA, et al. – Authors of this work tried to review the manufacturing procedures of food allergen extracts and applicable regulatory requirements from government agencies, potential approaches to standardization, and clinical application of these products. An exploration gave evidence for a need of many considerations in the manufacturing of food allergen extracts to achieve the maximal quality of the final product. Indicating a potential area for future improvement, allergen extracts for a select number of foods seemed to be inconsistent between manufacturers or unreliable in a clinical setting