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.
It's helpful to know how many of the calories you're getting come from fat. The 2010 U.S. dietary guidelines recommend that children and teens ages 4â18 get between 25% to 35% of their daily calories from fat. But food labels don't always show the percentage of fat in a food. It is easy to calculate, though. Divide the number of calories from fat by the number of total calories and multiply by 100: For example, if a 300-calorie food has 60 calories from fat, you divide 60 by 300 and then multiply by 100.