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.
For teenagers, fat would correspond to 25 to 35 percent of their daily calories, while children should get as much as 30 to 40 percent of their calories from fat. Based on a 2,000-calorie diet, adults should get between 44 and 78 grams of fat a day. Fat is found in butter, oils, avocado, nuts and nut butters.