The purpose of this pilot study was to examine the validity of a questionnaire developed to assess adult consumer understanding of nutrition marketing terms and the resulting impact on consumer behavior. Participants (n = 40) completed an electronic questionnaire. Efforts to establish validity and reliability suggest that the questionnaire is a useful tool for assessing consumer understanding of nutrition marketing terms and the impact of various marketing terms, although it can be improved. Pilot study findings indicate that most participants did not have an accurate understanding of terms such as "gluten-free," "non-GMO," "natural," and "organic." The next step will be to administer this questionnaire to a larger, national sample.