Lau Y, et al. - In view of the limited effects of many existing electronic health (eHealth) interventions with a general approach, researchers identified the necessity for a personalized approach. In this work, they examined the effectiveness of personalized eHealth interventions in decreasing body weight and sought for the effective key features of such interventions. Searching seven databases from inception until September 6, 2018, they identified 26,733 records; of these, they included 15 RCTs were included. As per meta-analysis, the personalized eHealth intervention group exhibited a significant reduction compared with that observed in the control group. A statistically significant impact of age and year of publication was observed on the effectiveness of an intervention. Findings support a possible utility of personalized eHealth intervention for reducing weight. The inclusion of tailored content and customized feedback in future design elements is recommended.