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FAQs on Nutrition and Weight Loss

Nutrition  Weight Loss Other Useful Links

Nutrition

  1. Can vegetables prevent cancer ?                                                                       

  2. Why is fiber important to your diet ?

  3. What are tips for getting more fiber in your diet ?

  4. What are some tips to reduce fat and cholesterol in my diet ?

  5. What are some tips in choosing a snack ?

  6. How do I know which fats are okay and which ones to avoid ?

  7. Are there nutritional differences between fresh foods and canned foods ?

  8. Does freezing affect the level of nutrients contained in foods ?

  9. Does pasteurization affect the nutritional value or flavor of foods ?

  10. How can I start planning a healthy diet for me and my family ?

  11. What are the most important steps to a healthy diet ?

  12. Why is brown rice supposed to be more healthy than white rice ?

  13. Is there a special diet to prevent or control heart disease ?

  14. How do I know if my portions are too big or too small for a healthy diet ?

  15. What do all the labels I see on foods mean ?

  16. Why is it important to include dairy products in your diet ?

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Weight Loss

  1. What are the facts about weight loss ?

  2. What are some of the questionable weight loss products ?

  3. Do diet programs work ?

  4. What are sensible weight maintenance tips ?

Back to Food and Nutrition


Can vegetables prevent cancer ?

The National Cancer Institute, in its booklet Diet, Nutrition, & Cancer Prevention: A Guide to Food Choices, states that 35 percent of cancer deaths may be related to diet. The booklet states:

FDA, in fact, authorized several health claims on food labels relating low-fat diets high in some plant-derived foods with a possibly reduced risk of cancer.

While FDA acknowledges that high intakes of fruits and vegetables rich in beta-carotene or vitamin C have been associated with reduced cancer risk, it believes the data are not sufficiently convincing that either nutrient by itself is responsible for the association. Nevertheless, since most fruits and vegetables are low-fat foods and may contain vitamin A (as beta-carotene) and vitamin C, the agency authorized a health claim relating diets low in fat and rich in these foods to a possibly reduced risk of some cancers.

Another claim relates low-fat diets high in fiber-containing vegetables, fruits and grains to a possible reduction in cancer risk. (The National Cancer Institute recommends 20 to 30 grams of fiber a day.) Although the exact role of total dietary fiber, fiber components, and other nutrients and substances in these foods is not fully understood, many studies have shown such diets to be associated with reduced risk of some cancers.

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Why is fiber important to your diet ?

What can fiber do for you? Numerous epidemiologic (population-based) studies have found that diets low in saturated fat and cholesterol and high in fiber are associated with a reduced risk of certain cancers, diabetes, digestive disorders, and heart disease. However, since high-fiber foods may also contain antioxidant vitamins, phytochemicals, and other substances that may offer protection against these diseases, researchers can't say for certain that fiber alone is responsible for the reduced health risks they observe, notes Joyce Saltsman, a nutritionist with FDA's Office of Food Labeling. "Moreover, no one knows whether one specific type of fiber is more beneficial than another since fiber-rich foods tend to contain various types," she adds.

Recent findings on the health effects of fiber show it may play a role in:

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What are tips for getting more fiber in your diet ?

To fit more fiber into your day:

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What are some tips to reduce fat and cholesterol in my diet ?

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What are some tips in choosing a snack ?

Today, it's easier than ever to find a version of your favorite brand or type of snack food that is lower in fat or sodium--or both--than the "regular" version. With a bit of comparison shopping, you'll find snack foods you can enjoy even if you are on a restricted diet because of high blood pressure or another medical problem. These are some of the descriptors to look for on the front of the package:

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How do I know which fats are okay and which ones to avoid ?

There are different kinds of fats in our foods. Some can hurt our health, while others aren't so bad — some are even good for you! Here's what you need to know:

·        Monounsaturated fats (canola, olive and peanut oils, and avocados) and polyunsaturated fats (safflower, sesame, sunflower seeds, and many other nuts and seeds) don't raise your LDL ("bad") cholesterol levels but can raise your HDL ("good") cholesterol levels. To keep healthy, it is best to choose foods with these fats.

·        Saturated fat, trans fatty acids, and dietary cholesterol raise your LDL ("bad") blood cholesterol levels, which can lead to heart disease. Saturated fat is found mostly in food from animals, like beef, veal, lamb, pork, lard, poultry fat, butter, cream, whole milk dairy products, cheeses, and from some plants, such as tropical oils. Tropical oils include coconut, palm kernel, and palm oils that are found in commercial cakes, cookies, and salty snack foods. Unlike other plant oils, these oils have a lot of saturated fatty acids. Some processed foods (such as frozen dinners and canned foods) can be quite high in saturated fat — it' s best to check package labels before purchasing these types of foods.

·       Trans fatty acids (TFAs) are formed during the process of making cooking oils, margarine, and shortening and are in commercially fried foods, baked goods, cookies, and crackers. Some are naturally found in small amounts in some animal products, such as beef, pork, lamb, and the butterfat in butter and milk. In studies, TFAs tend to raise our total blood cholesterol. TFAs also tend to raise LDL ("bad") cholesterol and lower HDL ("good") cholesterol. One study found that the four main sources of trans fatty acids in women's diets come from margarine, meat (beef, pork, or lamb), cookies, and white bread. At this time, TFAs are not listed on nutrition labels, but that will soon change. Although it might take a couple of years to begin seeing it, the Food and Drug Administration (FDA) is now asking food manufacturers to begin labeling TFA content. And some food manufacturers are announcing they are taking TFAs out of their food.

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Are there nutritional differences between fresh foods and canned foods ?

The heating process during canning destroys from one-third to one-half of vitamins A and C, riboflavin, and thiamin. For every year the food is stored, canned food loses an additional 5 to 20% of these vitamins. However, the amounts of other vitamins are only slightly lower in canned food than in fresh food.

Most produce will begin to lose some of its nutrients when harvested. When produce is handled properly and canned quickly after harvest, it can be more nutritious than fresh produce sold in stores.

When refrigerated, fresh produce will lose half or more of some of its vitamins within 1 to 2 weeks. If it's not kept chilled or preserved, nearly half of the vitamins may be lost within a few days of harvesting. For optimum nutrition, it is generally recommended that a person eat a variety of foods.

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Does freezing affect the level of nutrients contained in foods ?

Fortunately, the freezing process itself does not reduce nutrients, and, for meat and poultry products, there is little change in protein value during freezing.

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Does pasteurization affect the nutritional value or flavor of foods ?

Pasteurization can affect the nutrient composition and flavor of foods. In the case of milk, for example, the high- temperature-short-time treatments (HTST) cause less damage to the nutrient composition and sensory characteristics of foods than the low-temperature-long-time treatments (LTLT).

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How can I start planning a healthy diet for me and my family ?

You can start planning a healthy diet by looking at the Dietary Guidelines for Americans (http://www.health.gov/dietaryguidelines) by the U.S. Department of Agriculture (USDA) and the Department of Health and Human Services (HHS). These guidelines contain the Food Guide Pyramid, which shows how different food groups can come together to form your total diet. Eating is one of life's greatest pleasures. Because there are many foods and many ways to build a healthy diet, there is lots of room for smart, healthy choices. But you can use the pyramid as a starting point. Choose the recommended number of daily servings from each of the five major food groups.

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What are the most important steps to a healthy diet ?

Although there are different food pyramids for you to choose from, the challenge is to pick one, then create an eating plan that embraces healthy food. No matter which specific diet or pyramid you choose, the basic steps to good nutrition come from a diet that:

·         helps you either lose weight or keeps your BMI in the "healthy" range

·         is balanced overall, with foods from all groups, with lots of delicious fruits, vegetables, and grains

·         is low in saturated fat and cholesterol and moderate in total fat intake (less than 10 percent of your daily calories should come from saturated fat, and less than 30 percent of your daily calories should come from total fat)

·         includes a variety of grains daily, especially whole grains, a good source of fiber

·         includes enough fruits and vegetables (a variety of each, five to nine servings each day)

·         has a small number of calories from added sugars (like in candy, cookies, and cakes)

·         has foods prepared with less sodium or salt (aim for no more than 2,400 milligrams of sodium per day, or about one teaspoon of salt per day for a healthy heart)

·         does not include more than one drink per day (two drinks per day for men) if you drink alcoholic beverages

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Why is brown rice supposed to be more healthy than white rice ?

The husk (brown part) of brown rice is the part that contains the nutrients necessary to digest and balance the carbohydrate content (the "white" part). The husk is removed by milling, leaving only the starch, and the minerals, vitamins, fats. etc. needed to balance the starch are leached from the body's reserves - which are often already depleted due to consumption of other refined foods such as refined sugar and flour products. The net result is an overly acidic condition which leads to liquid retention and formation of mucus, providing a breeding ground for unhealthful bacteria and adding extra weight to the body.

When properly cooked, brown rice also tastes much better than white rice. The way to bring out the utmost flavor of brown rice is by pressure cooking for at least 40 minutes with a small amount of sea salt (1/4 tsp. per cup of dry rice), using about 1.5 cups of water to a cup of dry rice (use a bit more water in drier climates and higher altitudes). Wash the rice first several times in cold water (to prevent leaching of minerals) until the dust is gone, then add the rice and water to the pressure cooker. Bring the contents to a boil without the lid, then add the salt and attach the lid. Bring up the pressure and then lower the flame to the smallest level. Start the timer at this point. Shut off the flame when the time is up, and leave the pot closed until the pressure is naturally reduced, then open the cooker and blend the rice from top to bottom gently, using a wooden spatula that you have soaked in cold water to prevent the rice sticking to it. Re-attach the cover and wait about 5-10 minutes before serving.

If you do not have a pressure cooker, a good alternative is to use a heavy cast iron pot with a heavy lid. In this case, wash and then soak the rice for several hours before cooking, and use about 25% more water.

The full flavor of brown rice is brought out by thorough chewing. Complete chewing gradually reduces the husk to a fine pulp. One will generally have to hold the pulp in the sides of the mouth several times while sucking out and swallowing the liquid part. This manner of chewing not only ensures the best flavor but also makes for maximum digestibility, because the husks of brown rice - and all whole cereal grains, for that matter - require a certain salivary enzyme in order to be fully digested. Incomplete chewing is the reason why, after eating sweet corn, you will often see whole kernels of corn in your stool. The husks of whole grains simply can't be broken down properly anywhere but in the mouth.

To truly appreciate the flavor of unpolished rice, resist the temptation to add sauces. This practice just encourages one to swallow the rice before it has been sufficiently chewed. When you do not thoroughly chew the rice, it is almost the same as eating white rice, because you won't get the full benefit of the nutrients in the husks.

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Is there a special diet to prevent or control heart disease ?

Heart disease is the #1 killer of both women and men. Eating a heart-healthy diet is key to help reduce your risk factors for heart disease, like high blood pressure, high blood cholesterol, overweight, and obesity. It also will help you control these conditions if you already have them.

Here are some general guidelines for heart-healthy eating:

·        Choose foods low in saturated and trans fats. Foods low in saturated fat include fruits, vegetables, whole grain foods, and low-fat or nonfat dairy products. Try to avoid commercially fried and baked goods such as crackers and cookies.

·        Choose a diet moderate in total fat. The good news is that you don't have to eliminate all fat from your diet! A diet moderate in fat will give you enough calories to satisfy your hunger, which can help you to eat fewer calories, stay at a healthy weight, and lower your blood cholesterol level. To keep your total fat intake moderate, try to substitute unsaturated fat for saturated fat.

·        Choose foods low in cholesterol. Try to eat fruit, vegetables, whole grains, low-fat or nonfat dairy products, and moderate amounts of lean meats, skinless poultry, and fish. Eat plenty of soluble fiber, which may help lower your LDL ("bad") blood cholesterol. Good sources are oat bran, oatmeal, beans, peas, rice bran, barley, citrus fruits, and strawberries. Insoluble fiber will not help your blood cholesterol level but is still good for healthy bowel function. Good sources of insoluble fiber are whole wheat breads, kidney beans, almonds, beets, carrots, brussel sprouts, broccoli, cauliflower, green beans, and apple skin.

·        The American Heart Association also recommends that you try to eat at least two servings of fish per week (especially fatty fish like salmon and lake trout) because they are high in omega-3 fatty acids, which may help lower blood cholesterol. Some types of fish, such as swordfish, shark, or king mackerel, may contain high levels of mercury and other environmental contaminants that can damage the brain and nervous system, especially in developing fetuses. Children, pregnant, and breastfeeding women should limit how much fish they eat to no more than 12 ounces per week.

·        You also can eat omega-3 fatty acids from plant sources, such as from tofu, soybeans, canola, walnuts, and flaxseed (these contain alpha-linolenic acid, a less potent form of omega-3 fatty acid).

·        Cut down on sodium. If you have high blood pressure as well as high blood cholesterol — and many people do — your health care provider may tell you to cut down on sodium or salt. Even if you don't have high blood pressure or cholesterol, try to have no more than 2,400 milligrams of sodium each day. The DASH Diet also recommends a lower level of 1,500 mg of sodium a day. You can choose low-sodium foods, which will also help lower your cholesterol, such as fruits, vegetables, whole grains, low-fat or nonfat dairy products, and moderate amounts of lean meat. To flavor your food, reach for herbs and spices rather than high-sodium table salt. Be sure to read the labels of seasoning mixes because some contain salt.

·        Watch your body weight. It is not uncommon for overweight people to have higher blood cholesterol than people who are not overweight. When you reduce the fat in your diet, you cut down not only on cholesterol and saturated fat but on calories as well. This will help you to lose weight and improve your blood cholesterol, both of which will reduce your risk for heart disease.

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How do I know if my portions are too big or too small for a healthy diet ?

It can be hard to learn if your portions of food are putting you over amounts of things you're trying to control. It doesn't help that sizes for everything from bananas to soft drinks have gotten larger in the past 20 years. It's not enough to eat the right kinds of food to maintain a healthy weight or to lose weight. Eating the right amount of food at each meal is just as important. If you are a healthy eater, it is possible to sabotage your efforts by eating more than the recommended amount of food. A serving is a specific amount of food, and it might be smaller than you realize. Here are some examples:

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What do all the labels I see on foods mean ?

Here are some definitions based on one serving of a food. If you eat more than one serving, you will go over these levels of calories, fat, cholesterol, and sodium.

Calorie-free: fewer than 5 calories
Low calorie: 40 calories or fewer
Reduced calorie: at least 25% fewer calories than the regular food item has
Fat free: less than ½ gram of fat
Low fat: 3 grams of fat or fewer
Reduced fat: at least 25% less fat than the regular food item has
Cholesterol free: fewer than 2 milligrams cholesterol and no more than 2 grams of saturated fat
Low cholesterol: 20 milligrams or fewer cholesterol and 2 grams or less saturated fat
Sodium free: fewer than 5 milligrams sodium
Very low sodium: fewer than 35 milligrams sodium
Low sodium: fewer than 140 milligrams sodium
High fiber: 5 grams or more fiber

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Why is it important to include dairy products in your diet ?

Dairy products are an important source of calcium in our diets.  Calcium builds strong bones and teeth and can help prevent osteoporosis. Drinking milk, eating yogurt or cheese are the easiest ways to be sure you are getting enough dairy each day. For more information:

 http://ohioline.osu.edu/hyg-fact/5000/5506.html

 http://www.calciuminfo.com/

 http://ohioline.osu.edu/bl-fact/l-504.pdf

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What are the facts about weight loss ?

Being obese can have serious health consequences. These include an increased risk of heart disease, stroke, high blood pressure, diabetes, gallstones, and some forms of cancer. Losing weight can help reduce these risks. Here are some general points to keep in mind:

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What are some of the questionable weight loss products ?

Some dieters peg their hopes on pills and capsules that promise to "burn," "block," "flush," or otherwise eliminate fat from the system. But science has yet to come up with a low-risk "magic bullet" for weight loss. Some pills may help control the appetite, but they can have serious side effects. (Amphetamines, for instance, are highly addictive and can have an adverse impact on the heart and central nervous system.) Other pills are utterly worthless.

The Federal Trade Commission (FTC) and a number of state Attorney General have successfully brought cases against marketers of pills claiming to absorb or burn fat. The Food and Drug Administration (FDA) has banned 111 ingredients once found in over-the-counter diet products. None of these substances, which include alcohol, caffeine, dextrose, and guar gum, have proved effective in weight-loss or appetite suppression.

Beware of the following products that are touted as weight-loss wonders:

Phony weight-loss devices range from those that are simply ineffective to those that are truly dangerous to your health. At minimum, they are a waste of your hard-earned money. Some of the fraudulent gadgets that have been marketed to hopeful dieters over the years include:

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Do diet programs work ?

Approximately 8 million Americans a year enroll in some kind of structured weight-loss program involving liquid diets, special diet regimens, or medical or other supervision. In 1991, about 8,500 commercial diet centers were in operation across the country, many of them owned by a half-dozen or so well-known national companies.

Before you join such a program, you should know that according to published studies relatively few participants succeed in keeping off weight long-term. Recently, the FTC brought action against several companies challenging weight-loss and weight-maintenance claims. Unfortunately, some other companies continue to make overblown claims.

The FTC stopped one company from claiming its diet program caused rapid weight loss through the use of tablets that would "burn fat" and a protein drink mix that would adjust metabolism. The FTC also took action against three major programs using doctor-supervised, very low-calorie liquid diets, and they agreed to stop making claims unless they could back them up with hard data.

Before you sign up with a diet program, you might ask these questions:

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What are sensible weight maintenance tips ?

Losing weight may not be effortless, but it doesn't have to be complicated. To achieve long-term results, it's best to avoid quick-fix schemes and complex regimens. Focus instead on making modest changes to your life's daily routine. A balanced, healthy diet and sensible, regular exercise are the keys to maintaining your ideal weight. Although nutrition science is constantly evolving, here are some generally-accepted guidelines for losing weight:

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Other useful links for more information on Food and Nutrition !

www.nutrition.gov

www.eatright.org

www.americanheart.org

www.ohioline.osu.edu

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Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture

All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status.

Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.

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