###### Abstract
Recent advancements in technology have significantly impacted the use of passive tools for assessing dietary intake [23], eating behaviour, and physical activity [24], which encompass various engineered devices, like wearables and sensors, as well as mobile phone applications and web-based tools. One area of promise in the field of emerging tools is sensor technology, which aims to facilitate more precise and unbiased measurement of dietary intake and eating behaviour compared to self-report methods and, therefore, may improve long-term adherence. These sensor-based tools can generally be categorized into three groups: wearable sensors, camera-based devices, and weight scale-based devices. Wearable sensors include devices with sensors positioned on the head or neck to detect chewing or swallowing, inertial sensors on the wrist to detect hand-to-mouth gestures as a proxy for bites, and other similar devices. Camera-based methods employ food images to identify consumed food and estimate energy intake [25]. * _Providing measurable health benefits_, which must be assessed using validated methodologies and metrics. Examples of quantifiable validated indicators of well-being encompass alterations in a particular nutrient biomarker (for instance, enhancing micronutrient levels), weight and body composition enhancements (such as improving weight status, bone mineral density, and muscle mass), or measurements of blood glucose regulation (for example, ameliorated fasting glucose or haemoglobin A1c), serum lipid profile, or protein function status and synthesis [26]. The delivery of nutrition care has undergone significant changes, primarily as a result of the initiatives associated with the COVID-19 pandemic, which have sparked extensive and comprehensive transformation within the healthcare industry. Telehealth-delivered dietary interventions incorporating nutrition education and telecosultations with dieticians (including nutritional assessment, management plans, and follow-up) have emerged as a new tool implemented during the COVID-19 pandemic as an alternative to in-person visits [27], and they have proven to be an effective approach to improve dietary behaviours among adults with chronic health conditions [28]. Apart from telehealth-enabled nutritional interventions, highly accessible nutrition programs, including culturally appropriate dietary recommendations that are tailored for low economic resources and alternative telenutrition approaches through social/mass media, which surged during the COVID-19 pandemic, could assist in managing diet-related chronic diseases globally and serve as a support for developing a global strategy to combat the growing burden of chronic diseases [29]. A recent systematic review of randomized clinical trials evaluating the cost-effectiveness of telehealth nutritional interventions in adults with chronic disease found that mHealth nutrition interventions were the most cost-effective (60%), across all telehealth interventions [30], reasoning that future mHealth-based interventions for managing the increasing number of patients at risk of or already diagnosed with chronic diet-related diseases would be a justifiable approach. However, patient demand and acceptance have a pivotal role in the successful implementation of telehealth in clinical care. To depict the future of telehealth in the post-COVID-19 era, the US Medical Group Management Association created a poll to determine the shift in patients' demand for telehealth; discouragingly, nearly two-thirds(64%) of doctors reported that patient demand had decreased from the beginning of 2023 (compared to 28% in November 2022), while 22% reported a constant demand, and 14% reported increased demand [31]. We consider that future research is needed to evaluate this trend over time, as factors like prolonged isolation and anxiety may have determined patients to rather seek in-person visits during the immediate postpandemic period.