Explore the complex world of reactive oxygen species (ROS), oxidative stress, and antioxidants in this comprehensive 39-minute medical lecture. Delve into the biology and medical implications of ROS, examining their structure, function, and role in health and disease. Learn about aerobic respiration, anaerobic fermentation, and the relationship between bacteria and oxygen. Discover the importance of enzymes, culture media, and differential culture media in studying these molecular entities. Gain valuable insights into this relatively new field of study, understanding how ROS biology intersects with modern medicine and its potential impact on diagnosis, treatment, and prevention of diseases.