Multidisciplinary Lifestyle Interventions for Neurological Disorders During the Silent Phase

This clinical trial aims to test the impact of multidisciplinary lifestyle interventions (MLI) in neurologically healthy but at-risk individuals. It aims to find out: * if giving four different kinds of lifestyle intervention and education slows down or reverses the expression of neurological disorder or their biomarkers. * new biomarkers that either help in the early detection of neurological disease or identify the impact of various lifestyle interventions combined. Participants will be randomized to the intervention or observation arm. Various biological samples and tests, along with survey questionnaires, will be performed at the time of entering the study, at 12 weeks after enrollment, and then at the end of the study at 12 months. * Intervention arm: Participants will receive weekly, instructor-led intervention sessions (virtual group sessions) for 12 weeks. After the 12-week mark, participants will be encouraged to practice what they learned for nine more months. * Observation arm: The intervention group will be compared to another group that did not get the intervention