TBARs (Thiobarbituric Acid Reactive Substances) are a group of compounds that are used as biomarkers for oxidative stress in cells and tissues. There are several synonyms for TBARs that are used interchangeably, including MDA (Malondialdehyde), LD (Lipid peroxidation derivatives), TBA (Thiobarbituric Acid), and LPO (Lipid peroxidation). These terms describe the same group of compounds that are formed when lipids in cell membranes are exposed to oxidative stress, leading to their breakdown and formation of reactive substances. TBARs and their synonyms are commonly used in research and clinical settings to measure oxidative stress levels in various diseases, including cardiovascular disease, cancer, and neurodegenerative diseases.