Additional information about the detailed Materials and Methods for this study, additional analyses (comparisons of the pooled estimates for overall self-reported lifetime prevalence and overall self-reported physician-diagnosed lifetime prevalence, nutrient compositions of the eight common food allergens from USDA, correlation analyses for the carbohydrate, fat and others contents in food allergens and their corresponding food allergy prevalence, correlation analysis for the protein content in food allergens and their corresponding self-reported lifetime food allergy prevalence reported in 93 individual studies reviewed by Spolidoro et al. [4] after adjusting by weight reported in the original meta-analysis, correlation analyses for the protein content in food allergens and their corresponding self-reported physician-diagnosed lifetime prevalence, sensitivity analyses excluding milk, correlation analyses for the glycine content in food allergens and their corresponding self-reported lifetime food allergy prevalence, and statistical outputs from linear mixed-effect modelling), is available via Online Repository: https://github.com/Nidane/Nutrient-Allergenicity.