The aim of the present study was to evaluate the immediate impact of a community-based intervention intended to increase the participation of fruit and vegetables in the diet of families living in an extremely low-income community in the city of Sao Paulo. We carried out a non-controlled community-based intervention study with a sample of 36 families. The intervention included a nutritional education component and actions on the environment to improve the availability of fruit and vegetables. The immediate impact of the intervention was evaluated by comparing the participation of fruits and vegetables in the total food energy purchased in the months before and after the intervention. The intervention was effective, increasing household availability of fruit and vegetables by 2.5 percentage points (95%CI: 0.45 - 4.71)