Recent Update: 5,085 epigenetic causal knowledge based on Mendelian randomization (MR) has been added online on 1 December 2024 Recent Update:New EWAS on Parkinson's disease (PD) has been added online on 1 December 2024 New Module: A feature showcasing 12,409 epigenetic causal knowledge based on Mendelian randomization (MR) has been added Recent Update:New EWAS on Chung-Jansen syndrome has been added online on 17 August 2024 New Database: EWAS Data Hub (A data hub of DNA methylation array data and metadata) New Toolkit: EWAS Toolkit (A web toolkit for epigenome-wide association study)