This study will utilize a “natural experiment” study design, examining the influence of the opening of a new full-service grocery store in a low-income, multi-ethnic neighborhood in San Francisco. The specific aims of the study include: (a) assessing the impact of the opening of this grocery store on healthy food and beverage availability in an underserved community, (b) assessing the impact of this store opening on the food purchasing and eating practices of local families living in the area within one year of the opening, and (c) assessing the community perceptions related to the advantages and/or disadvantages of a new supermarket in their community. A mixed method data collection approach will be used before and after the opening of the new store.