The marketing of unhealthy commodities through traditional media is known to impact consumers’ product attitudes and behaviors. Less is known about the impacts of digital marketing (online promotional activities), especially among young people who have a strong online presence. This review systematically assesses the relationship between digital marketing and young people’s attitudes and behaviors towards unhealthy commodities. Literature was identified in June 2017 by searches in six electronic databases. Primary studies (both qualitative and quantitative) that examined the effect of digital marketing of unhealthy food or beverages, alcohol and tobacco products on young people’s (12 to 30 years) attitudes, intended and actual consumption were reviewed. 28 relevant studies were identified. Significant detrimental effects of digital marketing on the intended use and actual consumption of unhealthy commodities were revealed in the majority of the included studies. Findings from the qualitative studies were summarized and these findings provided insights on how digital marketing exerts effects on young people. One of the key findings was that marketers used peer-to-peer transmission of messages on social networking sites (e.g., friends’ likes and comments on Facebook) to blur the boundary between marketing contents and online peer activities. Digital marketing of unhealthy commodities is associated with young people’s use and beliefs of these products. The effects of digital marketing varied between product types and peer endorsed marketing (earned media) may exert greater negative impacts than owned or paid media marketing.

Young adults experience faster weight gain and consume more unhealthy food than any other age groups. The impact of online food marketing on “digital native” young adults is unclear. This study examined the effects of online marketing on young adults’ consumption behaviours, using energy drinks as a case example. The elaboration likelihood model of persuasion was used as the theoretical basis. A pre-test post-test experimental research design was adopted using mixed-methods. Participants (aged 18–24) were randomly assigned to control or experimental groups (N = 30 each). Experimental group participants’ attitudes towards and intended purchase and consumption of energy drinks were examined via surveys and semi-structured interviews after their exposure to two popular energy drink brands’ websites and social media sites (exposure time 8 minutes). Exposure to digital marketing contents of energy drinks improved the experimental group participants’ attitudes towards and purchase and consumption intention of energy drinks. This study indicates the influential power of unhealthy online marketing on cognitively mature young adults. This study draws public health attentions to young adults, who to date have been less of a focus of researchers but are influenced by online food advertising.

Promoting healthy infant feeding practices, such as breastfeeding, timing of introduction of solid foods, and cup use, has been recommended as an important strategy to prevent obesity in the early years.^1,2 The World Health Organization’s Commission report on Ending Childhood Obesity highlights that the first years of life are critical in establishing good nutrition, physical activity, and reduced screen time behaviors that reduce the risk of developing obesity.³ “Tummy time,” or time awake in the prone position, is a form of early movement or physical activity recommended for infants younger than 6 months.⁴ Recent research has linked tummy time to early infant motor movement and weight status.⁵

Objective: This study aimed to explore the nature and extent of, and level of user‐engagement with, appealing strategies used by the food industry to promote energy drinks on digital platforms. Methods: Thematic content analysis was employed to code the textual and visual elements of the data that were extracted from the online media pages of nine energy drinks, including posts on Facebook, YouTube, Twitter, and content of websites and advergames. Results: Four main themes were derived from the 624 textual and visual elements of digital marketing content of energy drink brands, including online social connectivity, desired social identity, enhancement of performance and enhancement of mood. Conclusions: Energy drinks were popular on digital platforms, as evidenced by the large volume of user‐engagement (e.g. ‘likes’ and ‘comments’) especially on social networking sites. Energy drink brands appear to target young people, given that the marketing appeals are likely attuned with young people’s desires or aspirations. Implications for public health: To counter the effects of digital marketing on young people’s health, regulations are needed to safeguard adolescents and young adults, as well as younger children, and consideration should be given to including all forms of marketing communication platforms, including the internet.

Summary: Background: Few randomized controlled trial (RCT) interventions targeted children's early risk behaviours using telephone or short message service (SMS) support.Objective: To evaluate the effectiveness of telephone or SMS early intervention focusing on mothers' behaviours starting from late pregnancy to improve BMI, and eating and screen time behaviours of children aged 2 years in comparison with the control group.Methods: A 3‐arm RCT was conducted in Australia, 2017–2019. Two arms involved the interventions using nurse‐led telephone or SMS support, delivered in nine stages from late pregnancy to age 2 years. The third arm was control. The primary outcome was children's objectively measured BMI and BMI z‐score at 2 years. Secondary outcomes included child eating and screen time behaviours as reported by parents at 2 years.Results: At 2 years, 797 mother–child dyads (69%) completed the telephone survey with 666 (58%) completing weight and height measurements. The study found no statistically significant difference in BMI between the groups. The mean BMI for telephone support was 16.93 (95% CI: 16.73 to 17.13), for SMS 16.92 (95% CI: 16.73 to 17.11) or for control 16.95 (95% CI: 16.73 to 17.16) with a difference of −0.02 (95% CI: −0.31 to 0.27, p = 0.907) in telephone versus control, and a difference of −0.03 (95% CI: −0.30 to 0.24, p = 0.816) in SMS versus control. Telephone support was associated with higher odds of no bottle at bedtime (adjusted odds ratio [AOR]: 2.99; 95% CI: 2.01 to 4.47), family meals (AOR: 2.05; 95% CI: 1.26 to 3.33), drinking from a cup (AOR: 1.89; 95% CI: 1.24 to 2.88), less screen time (<1 h/day) (AOR: 1.56; 95% CI: 1.10 to 2.23) and not eating dinner in front of the TV (AOR: 1.50; 95% CI: 1.09 to 2.06). SMS support was also associated with higher odds of no bottle at bedtime (AOR 2.30, 95% CI: 1.58 to 3.33) than the control.Conclusion: The telephone or SMS support intervention had no significant effects on BMI, but was effective in increasing no bottle use at bedtime. Telephone support showed more effects than SMS on reducing screen time and eating behaviours.