EAT FRUIT, NOT FAT
| Fruits contain carbohydrates and a small amount of protein, but very little, if any, fat. (Most fruits contain less than one gram of fat per serving. Avocados are an exception, with about 31 grams per fruit.) Carbohydrates (starches and sugars) and fats are the primary sources of energy (calories) in the diet. Calories in fruits come mostly from simple carbohydrates; that is, sugars such as fructose, sucrose and glucose. Compared with the early 1900s, Americans today eat more fatty foods and fewer starchy foods, such as breads and other grain products. This trend has doubtlessly helped to contribute pounds and pounds to the shapes of our citizens, because, ounce for ounce, fats contain more than twice as many calories as carbohydrates. In Dietary Guidelines for Americans, the U.S Department of Agriculture and the Department of Health and Human Services recommend reversing the trend, advising that Americans avoid too much fat and eat more foods with fiber and starch, such as whole-grain breads and cereals, vegetables such as dried beans and peas, and fruits. Of all these foods, fruits have the distinction of being called "nature's own desserts." This is a fitting appellation because, according to a 1987 survey by Market Facts, Inc., snack time is when 43 percent of the people surveyed said they most often ate fresh fruit. Lunch, breakfast, and dinner followed at 22 percent, 20 percent, and 14 percent, respectively. The survey also showed that people are eating more fruit than they were a year ago, and the number one reason is snacking, cited by 79 percent of the respondents. Other reasons given were concerns about a well-balanced diet (73 percent), nutrition (61 percent), and calories (61 percent), and getting good value for the money (48 percent). |
Why eat berries instead of bonbons? Because fruits contribute fiber and nutrients to the diet, as well as sweetness - and all that without adding lots of calories.
Peaches, apricots, cantaloupes, bananas, nectarines, mangoes and watermelon are sources of carotene, a precursor of vitamin A, an essential vitamin.
Grapefruits, oranges and other citrus fruits and juices, melons, berries, papayas, and kiwi fruit are sources of vitamin C. Among other things, vitamin C helps bind body cells together and increase iron consumption from foods.
Dried fruits - raisins, dates, prunes, and dried apricots - are good sources of iron and potassium; bananas, oranges, and other fruits also provide potassium. Iron combines with protein to make hemoglobin, which carries the oxygen in red blood cells from the lungs to cells throughout the body.
Many fruits also provide folic acid and magnesium. Folic acid is essential for several chemical processes in the body, including synthesis of the nucleic acids DNA and RNA, and formation of certain amino acids and hemoglobin. Magnesium is involved in cellular metabolism, protein digestion, and nervous system functions.
FRUIT AND FIBER
Eating fruit is a good way to add dietary fiber, too. Fiber is the parts of plants that are not digested by humans. The undigested food residue forms bulk for the stool. The skin, seeds and pulp in fruits contribute dietary fiber.
Eating foods high in fiber can promote normal bowel function and is useful in the prevention and treatment of constipation. On the basis of potential benefits, an expert panel of the Federation of American Societies for Experimental Biology (FASEB) has recommended a dietary fiber intake range of 20 to 35 grams per day or 10 to 13 grams per 1,000 calories for healthy adults. (The panel emphasized that this range of intakes may not be appropriate for children, the elderly, or persons on special diets.)
Data on the dietary fiber content of foods are incomplete, but it is known that the American diet is relatively low in fiber. At a USDA/FDA-sponsored conference on food safety and nutrition held in Washington, D.C., in October 1987, Susan Welsh, director of USDA's Nutrition Education Division, cited a 1986 USDA survey showing that women aged 19 to 50 consume an average of 12 grams of fiber a day, with only 1 in 20 women consuming 20 grams. A 1985 USDA survey found that men are doing better at 18 grams a day, but are still below the range recommended by FASEB.
In addition, in all but 12 percent of the women in the 1986 survey, fat intake averaged 37 percent of total daily calories, exceeding the 30 percent level advised by both the National Cancer Institute and the American Heart Association. High-fat (especially saturated fats) and high-cholesterol diets can contribute to an elevated blood cholesterol level, which is a risk factor for heart disease. There is some indication that some forms of dietary fiber may play a role in helping to lower blood cholesterol. It's not yet known whether fiber extracted from food has the same effect as that from intact food, and different forms of fiber have varying physiological effects. The USDA/HHS guidelines and the FASEB panel both advise that the best way to increase fiber intake is to eat a variety of foods and more of those that contain fiber.
The health news about fruit gets better and better because, besides providing some vitamins, minerals and fiber, fruits have no cholesterol and little or no fat or sodium. Whole fresh fruits provide the most fiber. For example, a whole apple with peel provides two grams of fiber, while one-half cup of applesauce provides 0.65 gram of fiber, and three-quarters of a cup of apple juice supplies only 0.25 gram of fiber.
FRESH, FROZEN OR CANNED?
Processing fruits can cause some nutrient losses. Current information is limited, and variations can occur depending on the product and the processing conditions. Freezing, canning and drying can result in variable losses of vitamin C and vitamin A. Also, canned and frozen fruits are often packed in sweetened syrups, which add extra calories. However, more and more fruits are being packed in water, juice or light syrup.
In defense of canning, National Food Processors Association vice president Roger Coleman claims in the July 1987 issue of the trade magazine Progressive Grocer that "one of the biggest misconceptions that people have about canned fruit is that it is full of additives and less nutritious than fresh fruit." He notes that fresh fruits can lose a lot of nutrients between the time they are picked and when they reach the table. However, proper handling both in shipment and at home can help reduce such losses. In the same article, Dan Thornton, marketing manager at Tri/Valley Growers, San Francisco, points out increasing consumer interest in low-sugar, low-calorie products. This is evidenced by a 17.8 percent increase in sales of "light" fruit in cans over 1986, and their 24 percent share of all canned fruit sales.
Consumers should read labels carefully, though. Although the word "light" or "lite" on a food label often means it is low or reduced in calories, it can refer to other properties of the food. In canned fruit, "light" syrup refers to its density, determined by the amount of liquid and sweeteners used.
FDA has established standards of identity that apply to many processed fruit products. They include requirements for what may be identified as a particular canned fruit, fruit juice, fruit jelly, or frozen fruit pie, for example, and also requirements for how these foods are to be labeled. In addition, the agency sets minimum standards of quality for some canned fruits, with specific attention, for example, to tenderness, color, and freedom from defects. Other standards regulate how full a container must be to avoid deceptive practices.
Dried fruits have a high concentration of sugar because most of their water content has been removed. Also, drying fruits can destroy vitamin C and carotene unless they are sulfured first, a process in which the fruit is exposed to fumes from burning sulfur or dipped in a sulfate solution. (Sulfites can cause allergic reactions, so people sensitive to these preservatives should read ingredient labels carefully. FDA has required since January 1987 that sulfites be listed on ingredient labels of packaged foods that contain them.)
When buying fresh fruits, consumers should look for bruising because the chemical reactions that occur from bruising cause loss of some nutrients. Nutrients can also be lost by paring, slicing or dicing fruits. Little Bobby may be fascinated by Mom's talent for paring an apple with one continuous intact peel, but without the peel, Bobby's not getting the most from that apple. In fact, the area just under the skin of fruits is usually richer in nutrients than the insides. Slicing, dicing, chopping and mashing can also rob fruits of some of their vitamins by exposing the surfaces to air and light. Breaking up the cells of fruits can account for a significant loss of some vitamins, and the longer the fruit stands, the greater the loss.
Almost any way you cut it, though, fruit has a lot to offer in terms of good taste and good nutrition.
Marian Segal is a member of FDA's public affairs staff.
FRUITY IDEAS
.Select fresh fruits that have no signs of bruising.
.Most fresh fruits are perishable and should be refrigerated.
.Use fresh fruits quickly to avoid spoilage and waste.
.Store canned fruits in a cool (best if below 85 degrees Fahrenheit), clean, dry place.
.Fruits that are cut up should be served just after preparing to prevent vitamin loss.
FAVORITE FRUITS
Grapes are the leading fruit crop of the world and the number two crop in the United States. But the majority (57 percent) of grapes grown in this country end up in wine bottles instead of fresh fruit bowls.
Although playing second fiddle to grapes in world production, the fruit that is the top banana of fruit sales in American supermarkets is - you guessed it - the banana.
Coming in third in world fruit production is the apple. There are 7,500 varieties of apples worldwide, with 2,500 varieties available in the United States. The colonists introduced the apple to North America in the 1620's, and the United States is now the second largest producer of this fruit, after the Soviet Union.
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