In a meta-analysis of 88 studies, we examined the association between soft drink consumption and nutrition and health outcomes. We found clear associations of soft drink intake with increased energy intake and body weight. Soft drink intake also was associated with lower intakes of milk, calcium, and other nutrients and with an increased risk of several medical problems (e.g., diabetes). Study design significantly influenced results: larger effect sizes were observed in studies with stronger methods (longitudinal and experimental vs cross-sectional studies). Several other factors also moderated effect sizes (e.g., gender, age, beverage type). Finally, studies funded by the food industry reported significantly smaller effects than did non–industry-funded studies. Recommendations to reduce population soft drink consumption are strongly supported by the available science.

The present study experimentally investigated the effect of Facebook usage on women's mood and body image, whether these effects differ from an online fashion magazine, and whether appearance comparison tendency moderates any of these effects. Female participants (N=112) were randomly assigned to spend 10min browsing their Facebook account, a magazine website, or an appearance-neutral control website before completing state measures of mood, body dissatisfaction, and appearance discrepancies (weight-related, and face, hair, and skin-related). Participants also completed a trait measure of appearance comparison tendency. Participants who spent time on Facebook reported being in a more negative mood than those who spent time on the control website. Furthermore, women high in appearance comparison tendency reported more facial, hair, and skin-related discrepancies after Facebook exposure than exposure to the control website. Given its popularity, more research is needed to better understand the impact that Facebook has on appearance concerns.

This study examined the relationship between Instagram use (overall, as well as specifically viewing fitspiration images) and body image concerns and self-objectification among women between the ages of 18 and 25 from the United States (n = 203) and from Australia (n = 73). Furthermore, this study tested whether internalization of the societal beauty ideal, appearance comparison tendency in general, or appearance comparisons to specific target groups on Instagram mediated any relationships between Instagram use and the appearance-related variables. Greater overall Instagram use was associated with greater self-objectification, and that relationship was mediated both by internalization and by appearance comparisons to celebrities. More frequently viewing fitspiration images on Instagram was associated with greater body image concerns, and that relationship was mediated by internalization, appearance comparison tendency in general, and appearance comparisons to women in fitspiration images. Together, these results suggest that Instagram usage may negatively influence women’s appearance-related concerns and beliefs.