In Tunisia, food security policies’ objectives are increasing production to satisfy the growing demand and reduce the food deficit rate (35% per year). Since 1980, intensive production system and government subsidies for basic commodities were used to enhance food availability. This article aims to analyze food quantitative security policy impact on Tunisian consumption model versus Mediterranean diet and to readjust policies for qualitative food security. Based on five-year National Statistics Institute surveys on household consumption from 1985 to 2015, ANOVA analysis shows the need to address rural and urban consumption separately. Three groups were identified through clustering by consumption deviation degree compared to 1985. Variables of consumption evolution were determined by linear regression: price, income, location, domestic production and a quality factor measuring the conformity degree with Mediterranean diet. In order to achieve a better adherence to Mediterranean diet, new measures and synergy should take place at several levels policy makers, producers and consumers.