The most recent global burden of disease data demonstrates low vegetable intakes continue to make a significant contribution being ranked risk factor 25 (1). Young adults remain as lowest adult consumers with an average of 152 g reported in the National Nutrition and Physical Activity Survey 2023. A previous meta-analysis of five digital interventions in young adults showed no significant improvements but recognising increasing use of social media interventions an update seemed appropriate (2). Thus, the question guiding this systematic review was ‘what is the effectiveness of interventions to increase vegetable intake among 18- to 35-year-olds delivered using social media, electronic, and mobile health? The review protocol was registered in PROSPERO (CRD 420261342106). Inclusion factors were adults 18-35 years (population), study aimed to increase vegetable intake and delivered electronically (intervention), controls were no or another intervention, outcomes were vegetable intake in g, cups, serves or frequency and study design randomised controlled trial (RCT). A systematic search of seven databases was performed to retrieve studies published from January 2015 to March 2026 in English. All aspects of the review were conducted in duplicate, ROB2 was used to assess intervention quality and Grading of Recommendations Assessment, Development and Evaluation (GRADE) performed. Eleven studies met eligibility criteria and of these seven studies contributing 13 data sets were included in a random-effects meta-analysis (using metafor package of R). A total of 2030 individuals participated in the RCTs, and the trials were conducted in Australia (n = 4), the United States (n = 3), and one each in the United Kingdom, New Zealand and Spain. Among the included media were websites, mobile apps, text messaging, emails and one had additional coaching. Five studies used one media, others employed combinations but only two used social media. The duration of studies was short, three days to six months, and most without follow-up. Goal setting, self-monitoring, feedback and education were the most frequently used techniques for intervention. No significant effect was shown for vegetable intake (d = 0.07, 95% CI: -0.081 to 0.22, p = 0.37). Heterogeneity statistics demonstrated a moderate heterogeneity (I2 = 40%, τ = 0.17; τ2 = 0.03, Q = 19.8; p = 0.072), which was supported by the p-value of Egger’s regression test (p = 0.215). Among studies that could not be included because of the measurement of outcome, five reported positive effects but only two were low risk of bias. In conclusion, while digital technologies and social media may enable interventions to be delivered via preferred media at scale, it seems messages may be lost in a food environment that does not make eating vegetables an easy choice with so much food prepared outside the home and cooking skills declining in younger populations.