For a lifestyle to be healthy which i am sure each of us expects, you may want to change what you cook and most importantly how you cook. Depending on your chosen method , you may be depleting the essential nutrients out of your food. You could be preparing a meal with the perfect nutritious ingredients one needs to have but after you are done cooking, you may end up with a dish that has literally no nutritional value.
When heat is applied, many vitamins and minerals are burnt away. The higher the temperature and the longer you cook it, the fewer nutrients you will have in your meal. It is important then not to overcook your meals, try to cook your meals in the shortest time possible and with the minimum amount of water possible. However, dry cooking methods such as roasting and baking are perhaps the worst method, as they require a longer cooking time. Microwaving, frying, boiling and sautéing are some of the methods that you need to consider before you cook. Steaming and stir-frying are better choices, as they will allow the natural nutrition to remain in your food.
It is also important to consider the oxidation that occurs in vegetables once they are cut, as oxidation will neutralize the vitamins. For this reason, try not to cut or chop your vegetables way ahead of time.