The Natural & Ultra-Processed Foods (NUPF) database includes 40 images of food stimuli photographed on a grey background. Twenty images depict a natural food item (such as an apple) or lightly processed item (such as cheese) and twenty images depict an ultra-processed item (e.g., a chocolate bar). Ratings were obtained from two sets of participants. The first group (n = 70) rated the stimuli on approachability (approach/avoid), desirability, popularity, and healthiness. The second group (n = 90) rated the same items on valence, arousal, and recognizability. Participant details can be found in Table 1 (which can be found in the NUPFdatabase.zip). Natural foods are typically considered healthier than ultra-processed foods, therefore tentative category labels regarding healthiness are included as well. The NUPF database includes the minimum, maximum, and mean ratings per food item. Also information regarding the weight of the portion, calories per portion, and calorie density (calories per 100 or 1 gram) are included. The NUPFdatabase.zip includes: - 40 High resolution images (divided into healthy and unhealthy categories) - 40 low resolution (websize) images (divided into healthy and unhealthy categories) - Mean ratings on valence, arousal, approach/avoid, desirability, popularity, perceived healthiness, and recognizability - Table 1 with details regarding the raters (i.e., participants who rated the images) - A readme file regarding info about the rating file