Figure 2.BHARAT study workflow for recruitment, sampling, and analysis. Schematic overview of the three-stage study pipeline comprising (I) volunteer recruitment and screening, (II) on-site clinical examination, biospecimen collection, and metadata acquisition, and (III) sample processing and multi-modal analysis. Blood, cheek swab, hair, urine, and stool samples are subjected to complementary molecular, cellular, biochemical, and omics-based assays to enable integrated phenotyping of biological aging across cohorts.