Childhood eating practices are relevant to ultra-processed food consumption in adulthood: results from the Nutritionists' Health Study.

Studies on childhood feeding and current food consumption, according to the NOVA classification, in adults are scarce. The objective of this study was to evaluate the relationship between childhood dietary practices and the current consumption of different categories of processed foods in young adults using data from the Nutritionists' Health Study (NutriHS) cohort. A cross-sectional analysis was performed using data of 392 on nutrition undergraduate students or nutritionists aged ≥18 years. Current food consumption was assessed using a food frequency questionnaire and the NOVA classification. The investigated childhood eating practices included fruit and vegetable intake, exclusive breastfeeding, and other breastfeeding practices. Participants breastfed with introduction of solid, semi-solid or soft foods before 6 months had higher current consumption of processed foods than those who were not breastfed (ß = 4.30; 95% confidence interval [CI] = 0.56-8.04) and those who did not have the habits of eating fruits and vegetables during childhood consumed less unprocessed and minimally processed foods in adulthood than those who ate fruits and vegetables during infancy (ß = -3.76; 95% CI = -0.82 to -6.70). Further, later introduction of infant formula or other types of milk between 3 and 5 months of age had a lower current consumption of ultra-processed foods than those fed infant formula or other types of milk before 1 month age of life (ß = -3.09; 95% CI = -6.12 to -0.06). In conclusion, childhood feeding practices were linked to food consumption in adult life in NutriHS cohort, highlighting that the first 1000 days of life seems to impact on food choices during adulthood, with potential to protect against nutrition-related diseases later in life.