Global food expenditure patterns diverge between low-income and high-income countries

Abstract

Globalization, income growth and changing cultural trends are believed to prompt consumers in low-income countries to adopt the more affluent diet of high-income countries. This study investigates the convergence of food expenditure patterns worldwide, focusing on total food expenditure, raw food categories and ultra-processed foods and beverages across more than 90 countries over the past decades. Contrary to prior belief, we find that food expenditure patterns of lower-income countries do not universally align with those of higher-income nations. This trend is evident across most raw food categories and ultra-processed foods and beverages, as the income level of a country continues to play a crucial role in determining its food expenditure patterns. Importantly, expenditure patterns offer estimates rather than a precise idea of dietary intake, reflecting consumer choices shaped by economic constraints rather than exact dietary consumption. Knowing how consumers allocate their budget among different food categories helps us understand their preferences, priorities and economic accessibility. This study investigates the convergence of budget shares for total food, stimulants, raw food categories and ultra-processed foods and beverages across more than 90 countries over the past decades.