1. the act of attenuating or the state of being attenuated. 2. (General Physics) the loss of energy suffered by radiation as it passes through matter, esp as a result of absorption or scattering.
A healthy teenage boy may have a higher calorie intake of about 2,200 calories per day; about 61 to 86 g of fat should be consumed. Read more: http://www.livestrong.com/article/399246-a-teen-needs-how-many-grams-of-fat-per-day/#ixzz2QFhZ92Aj. For both teenage boys and girls, 5 to 6 tsp. of fat are recommended daily. Fat can't always be measured by the teaspoon, however, so it is easier to think of fat in actual percentages.
Consuming the right type of calories will help a teen girl meet her daily nutrient requirements. For example, the Institute of Medicine encourages teens to consume 45 to 65 percent of their calories from carbohydrates, 10 to 30 percent from protein and 25 to 35 percent of their daily calories from fats.