Food Nutritional Information Label

What is the difference between a serving and a portion?

The U.S. Food and Drug Administration (FDA) Nutrition Facts label appears on most packaged foods (see Figure 1). It tells you how many calories and servings are in a box or can. The serving size varies from product to product.

A portion is how much food you choose to eat at one time, whether in a restaurant, from a package, or at home. Sometimes the serving size and portion size match; sometimes they do not.

burger with fries

Diet Myth Busters: Fast foods are always an unhealthy choice. You should not eat them when dieting.

Truth: Many fast foods are unhealthy and over indulging in them will likely cause you to gain weight. However, you can eat fast food on occasion and simply choose menu options with care. Whether your are eating out, on-the-run, or at home the basic rules are the same: choose healthy foods that are nutrient rich, low in calories, and small in portion size.

The BMI is not accurate to determine if you are overweight.

The Simple Science Of Weight Loss

This video shows how the body converts all calories we eat into some form of energy.

  • 1 gram of carbohydrates = 40 calories
  • 1 gram of protein = 4 calories
  • 1 gram of fat = 9 calories.

However, the above are all converted to different things in the body. Carbohydrates are converted to glucose and other sugars; protein is converted to amino acids, fat is converted to glycerol and fatty acids.