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Introduction: In order to limit the risk of food allergies, it is recommended to begin complementary feedings for infants between the ages of 4 and 6 months old. The objective of this study is to describe how complementary feedings are carried out until the age of 1 year old and to analyze criteria, especially socio-economic, that influence compliance with recommendations. Methods: This observational and descriptive quantitative study lasted from November 21st, 2016 to February 21st, 2017 and took place in 10 doctor’s offices around the city of Saint-Etienne. Anonymous surveys were distributed to the mothers of children aged between 12 and 47 months old inclusive, born at term, and with a weight above 2.5 kg. Results: More than 2/3rds of the 163 children included started complementary feedings between 4 and 6 months old. Gluten (P = 0.02) and meat (P = 0.016) were introduced later and infant formulas (P = 0.005) were stopped sooner when the mother’s education level was low. The average number of fruit and vegetables was smaller when the mother had a low socio-economic level or if she was multiparous. At the age of one, fewer than 20% of the children had consumed fat content rich in omega-3. At the same age, 70% had consumed egg and 12.3% nuts, which are some of the major allergens. Conclusion: These outcomes show the need for general practitioners to inform parents, especially those with a low socio-economic level, about early food introduction, including allergens.