Dr Mark Porter investigates how the good and bad fats we eat can impact on our health, including trans fats that are found in many take away foods and are associated with heart disease. And he discovers that the health benefits of eating Omega fats depend on which you eat and when you eat them - too much Omega-6 for example, can hinder the benefits of Omega-3. Case Notes unpicks health messages about fat consumption that are confusing and contradictory. Producer: Erika Wright.