Ever wondered which cooking oil is healthiest? There’s canola oil, olive oil, sunflower oil, safflower oil — even hazelnut, avocado and apricot kernel oil. Each oil has a unique composition of fats and is manufactured in different ways. Some cooking enthusiasts will say that the healthiest oil is the one with the most omega-3s. Others warn against too much chemical processing and opt for “virgin” oils. What’s a person to do?