Reading a Nutrition Label
Every packaged food in a grocery store carries a nutrition facts label, and learning to read it can help you make smart choices. The most important line to check first is the serving size. All the numbers on the label describe one serving, not the whole package. A bag of chips might contain three servings, so eating the entire bag means tripling every number printed on it.
Next comes the calories, which measure the energy a food provides. Your body needs energy to grow, think, and play, so calories are not bad. The question is whether the food gives you useful nutrients along with the energy. The label lists fat, sodium, carbohydrates, protein, fiber, and sugars, as well as several vitamins and minerals. Fiber and protein are usually good things to look for. Added sugars and sodium, which is the part of salt that matters most for health, are things that most people should limit.
The label also shows the percent daily value, written as percent DV. This compares a serving to the amount a person is advised to eat in a whole day, based on a diet of 2,000 calories. As a quick guide, 5 percent or less is considered low for a nutrient, and 20 percent or more is considered high. So if you want less sodium, look for foods with a low percent DV.
Finally, check the ingredients list, which names everything in the food from most to least by weight. If sugar appears near the top, the food contains a lot of it. Reading labels takes only a few seconds, and it turns guessing into knowing.