The developmental transition of late adolescence, characterized by profound identity formation and neurocognitive maturation, has been complicated by the ubiquity of the digital landscape. This study investigates the impact of internet overuse on the psychological well-being (PWB) and self-regulated learning (SRL) of adolescents in Kerala, India. Utilizing a pre-test post-test control group design, the research evaluates the efficacy of Mindfulness-Based Cognitive Therapy (MBCT) as an intervention. A sample of 120 adolescents (N=120), screened for moderate to severe internet addiction, was equally divided into experimental and control groups. The findings indicate that excessive internet use significantly impairs both psychological well-being and self-regulated learning among adolescents, irrespective of gender or residential background. The 8-week MBCT intervention yielded statistically significant improvements in both Psychological Well-being (p <.001) and Self-Regulated Learning (p <.001) compared to the control group. These findings suggest that integrating mindfulness-based cognitive strategies into educational curricula can effectively counteract the cognitive fragmentation and emotional dysregulation associated with hyper-connectivity, offering a scalable pathway for adolescent holistic health.