Young adulthood is a pivotal transitional phase marked by increased autonomy and potential formation of lifelong dietary habits.(1) This presents a window of opportunity for nutrition promotion, with long-term implications for public health outcomes, healthcare burden and food security. Nevertheless, young adults are often overlooked in public healthcare planning. Many perceive healthy eating as inconvenient and costly, commonly reporting limited time, skills, and knowledge to plan and prepare healthy meals.(2) These factors can contribute to broader issues of diet-related health risks and food insecurity. Today’s young adults are shifting away from traditional sources and increasingly turning to digital platforms for news and information.(3) The COVID-19 pandemic further accelerated this shift, reshaping how health information is accessed and used.(4) Understanding this evolving trend will help inform the development of more accessible, innovative and tailored population-level nutrition strategies for this age group. This study aimed to scope the existing peer-reviewed literature to identify and examine digital sources of healthy eating knowledge for young adults (18-24 years). The review followed the JBI methodology for scoping reviews and the PRISMA-ScR checklist. Six databases (Medline, CINAHL, Global Health, Embase, Scopus, and Cochrane) were searched. Studies were included if they explored digital platforms commonly used by young adults to access nutrition-related information or reported digital nutrition education interventions with changes in healthy eating knowledge, awareness, attitudes or behaviours as outcomes. Eligible studies included primary research (quantitative, qualitative and mixed methods) and those published in English from 2010 onwards. In total, 88 studies were included in this review. Over half (n = 54) were published within the past five years. Female participants (n = 54) and tertiary students (n = 47) were overrepresented. The most frequently cited information sources were social media, particularly Instagram, Facebook, YouTube and TikTok, followed by the Internet (e.g. websites and search engines) and health applications (e.g. MyFitnessPal). Of 55 studies reporting digital sources’ impacts, 28 reported improvements in participants’ healthy eating knowledge, awareness, attitudes and/or behaviours. Negative impacts (n = 4) were largely associated with exposure to ‘fitspiration’ content, fitness influencers and junk food promotions. Ease of use, accessibility, appealing aesthetics, credibility and peer connection were among key characteristics of digital sources valued by young adults. This review demonstrated the widespread use of digital platforms among young adults for nutrition-related information and their potential to enhance the reach and effectiveness of public health nutrition interventions. Future health promotion strategies should prioritise this population group and harness digital sources to deliver evidence-based and visually engaging messages tailored to their needs and preferences. This approach may help address existing health inequity and barriers to healthy eating, support positive knowledge and behaviour changes, and ultimately contribute to overall public health goals.