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Healthnotes Newswire (July 17, 2008)—Everyone knows that fish is good for you, but it turns out that some is better than others for certain health needs and goals.

A new study, published in the Journal of the American Dietetic Association, analyzed 30 species of wild and farmed fish and found that while wild fish is generally more healthful than farm-grown, fish such as salmon and trout still maintain a beneficial fatty acid profile. Other farmed fish, such as talapia, do not, so while these may be incorporated into a regular diet as an occasional inexpensive, low-fat protein source, people wanting to maximize disease-fighting health benefits from fish will opt in favor of those with a better balance of fatty acids.

The ratio is the real measure of risk

A wealth of research shows that eating fish rich in omega-3 fatty acids may help prevent and treat diseases such as heart disease, diabetes, inflammatory and autoimmune diseases, and some cancers. However evidence increasingly points to the ratio of omega-3 to the less discussed omega-6 fatty acids in the diet as the indicator of disease risk.

• Fish with an omega-3 to omega-6 ratio of greater than one are considered beneficial because of their effect on the fatty acid profile of the entire diet.

• Fish with a ratio of 0.5 or lower are considered not protective against disease.

As a polyunsaturated fat, omega-6 also plays a role in supporting health, as long as it is consumed in moderation.

The best fish for fending off disease

The authors of the study collected samples of commonly eaten fish—including tuna, snapper, mahi-mahi, cod, sole, halibut, haddock, talapia, swordfish, catfish, salmon, and trout—from distributors in the US and Chile, from fish farms in the US, Chile, Canada, Ecuador, Honduras, Norway, and New Zealand, and from supermarkets in the US. Some highlights of their findings include:

• Sockeye salmon, Coho salmon, Copper River salmon, and farmed rainbow trout had a beneficial fatty acid pattern—in other words, a high ratio of omega-3 to omega-6 fatty acids.

• Farm-raised Atlantic salmon had high levels of omega-3 fatty acids but their levels of omega-6 fatty acids were higher than those of the wild salmon, making their ratio slightly less favorable, though still healthy.

• Tuna, one of the most commonly eaten fish in the US, had a low level of omega-3 fatty acids, but it also had a low omega-6 level, so its ratio remained favorable.

• On the other end of the spectrum, farmed talapia and catfish had low levels of omega-3 and poor ratios of omega-3 to omega-6 fatty acids.

Balancing factors besides fatty acids also important

Of all the fish reviewed in this study, tilapia has received the most attention for its unfavorable fatty acid content. “All other nutritional content aside, the inflammatory potential of hamburger and pork bacon is lower than the average serving of farmed tilapia,” the article cautions. However, keep in mind that a fish not being highly protective against heart disease does not mean it needs to be avoided entirely. Other health factors, such as heavy metal contamination—which are high in otherwise healthful fatty fish like tuna, but low in less heart-healthy fish like tilapia—should also be taken into account.

To give the pros and cons of fish consumption some real world perpective, consider that eating moderate amounts of farmed tilapia is roughly equivalent to other staples of the average diet, and may be a reasonable option for some people. For those at risk for inflammatory diseases such as heart disease, fish with a good omega-3 to -6 ratio such as salmon or trout are the best choice.

(J Am Diet Assoc 2008;108:1178–85)

Healthnotes Newswire (July 10, 2008)—Good news for your little juice lovers: Although several studies have suggested that drinking fruit juice might contribute to overweight in children, a review of 21 studies found that the link was not strong. “There is no systematic association between consumption of 100% fruit juice and overweight in children and adolescents,” said the study’s authors in the American Journal of Lifestyle Medicine.

The origins of overweight

While genetics play a role, diet and exercise patterns are also intimately involved in maintaining healthy weight. In a previous study, one researcher found that children who drank more than 12 ounces of fruit juice per day were more likely to be overweight than children who drank less juice. Since juice is the drink of choice for many youngsters, the new study compiled evidence from studies concerning juice consumption and overweight in children to try to answer the question: Does drinking juice make kids fatter?

Only 6 of the 21 studies reviewed found a relationship between drinking 100% fruit juice and overweight in children, none of which were based on a nationally representative sample. Those that found a relationship did so only in adolescent girls and children who were overweight to begin with. The other 15 studies—5 of which were based on nationally representative samples—found no relationship between drinking juice and becoming overweight.

The authors concluded, “The data do support consumption of 100% fruit juice in moderate amounts and suggest that consumption of fruit juice may be an important strategy to help children meet the current recommendations for fruit.”

“As the mother of one child who wants nothing to do with juice, and another who would drink it all day long, it is a relief to read this new study. I feel like it’s one less thing for me to stress about as a mom,” said Erin Goodman, founder of the Rhode Island Birth Network.

The importance of addressing obesity

According to the 2003-2004 National Health and Nutrition Examination Survey (NHANES), 17% of all children and adolescents are overweight. Among 2 to 5 year olds, the prevalence increased from 7 to 14% between 1988 and 2004; similar increases were seen among 6- to 19-year-olds in this time span, with an increase in the percentage of overweight children from 11 to 19%.

Says Dr. Matthew Baral, medical director of Hamilton Elementary School Clinic in Phoenix, “Eating the whole fruit is preferable to the juice, since the release of sugar in the bloodstream is somewhat blunted by the fiber in whole fruit. When consuming juice, dilute it with water to lessen the amount of sugar the child is getting.”

Help your child maintain a healthy weight

Here are some simple things that parents can do to help keep kids’ weight in a healthy range:

• Snack on fruits and veggies—Make a big fruit salad on the weekend; store in the fridge and eat all week. Keep ready-to-eat cut-up vegetables on hand for quick snacks. Baby carrots, snap peas, broccoli, and cauliflower are easy to eat on the go.

• Get moving in your free time—Set a positive example by making exercise a priority for the whole family.

• Limit TV time—Kids who watch more TV or eat while watching TV are more likely to become overweight.

• Avoid processed foods—Packaged snacks can contain hidden fats and sugar. Opt for home-baked goods to satisfy the urge to snack.

(AJLM 2008;doi:10.1177/1559827608317277)

Healthnotes Newswire (July 3, 2008)—It’s well known that vitamin D is needed for proper bone growth in children and general bone health in children and adults, but it appears that adolescents worldwide are vitamin D deficient, and that current recommendations for daily D may not be enough for health and disease prevention. The good news: a recent study finds that giving teens higher amounts of vitamin D can raise them to healthy levels after one year of treatment.

The value of the “sunshine vitamin”

Vitamin D deficiency may lead to abnormal bone growth and development and to the development of chronic diseases in adulthood such as osteoporosis, cancer, and multiple sclerosis, and research suggests that the recommended daily intake of 200 IU of vitamin D may not be enough to prevent deficiency. The authors of this new long-term study suggest that a vitamin D blood level of 30 ng/ml (measured as 25-hydroxyvitamin D) is desirable based on expert recommendations, but many people have much lower levels. They tested a higher dose of vitamin D to see if it was safe for teens and effective in raising vitamin D levels.

In the study, 340 students, ages 10 to 17, were randomly assigned to take low-dose vitamin D3 (1,400 IU per week), high-dose vitamin D3 (14,000 IU per week), or placebo. After one year of treatment, adolescents who received the high-dose vitamin D had significantly higher blood levels (average, 38 ng/ml of 25-hydroxyvitamin D) compared with the levels in the low-dose vitamin D (17 ng/ml) and placebo groups (16 ng/ml).

The authors claim that vitamin D deficiency “is prevalent in children and adolescents worldwide.” They add that the high worldwide prevalence of vitamin D deficiency, the fact that many adult diseases begin in childhood because of vitamin deficiencies, and increasing evidence for the safety of higher doses of vitamin D should prompt a change in the current recommendations for an adequate daily amount. More research is needed to determine the safety of taking higher daily doses of vitamin D and to determine optimal levels for health and disease prevention.

Get your daily D

A person gets vitamin D several ways:

• Modest sun exposure (approximately 20 minutes per day)—people who get very little sun exposure, such as those who live in cloudy climates and at northern latitudes, may need to rely on diet and supplements to achieve adequate vitamin D levels

• Supplements such as vitamin D3 and cod liver oil—1 teaspoon of some brands provides 400 IU of natural vitamin D

• Some foods and beverages—fortified milk and cereal, fatty fish such as salmon and mackerel, and, to a lesser extent, eggs, beef, some cheeses, and other foods

According to the American Academy of Dermatology, most people get the current recommended amounts of vitamin D through incidental sun exposure. They recommend using sunscreen when outdoors in the sun and obtaining needed amounts of vitamin D through foods and supplementation. However, for those not likely to take supplements or deliberately get enough D in the diet, it is important to weigh the risks and benefits of sun exposure against your risks for bone disease and other health issues. Talk to your doctor about your vitamin D needs and what combination of sources might be best for you.

(J Clin Endocrin Metab 2008:doi:10.1210/jc.2007-2530)

Healthnotes Newswire (June 26, 2008)—Yet more proof points to the importance of exercise and healthy eating to reduce the chance of developing diabetes in people at risk for the disease. With the onset of type 2 diabetes, the body’s ability to keep blood sugar (glucose) levels in check begins to diminish. Losing weight, exercising regularly, and eating well can help improve insulin sensitivity, protecting against diabetes or possibly halting its progression.

“In people with impaired glucose tolerance, group-based interventions targeting lifestyle changes such as diet and exercise produce a durable and long-lasting reduction in incidence of type 2 diabetes,” said the authors of a new study in the Lancet.

As part of the 20-year study, 577 people with impaired glucose tolerance (a prediabetic condition) were assigned to a control group (no intervention), or to one of three lifestyle intervention groups (diet, exercise, or diet plus exercise). The dietary intervention focused on eating more vegetables and consuming less sugar and alcohol. The exercise intervention concentrated on increasing leisure time physical activity.

The interventions lasted for 6 years; then the people were followed for 14 more to determine the long-term effects of the lifestyle changes on the risk of developing diabetes and related complications, including heart disease.

During the first 6 years, the people in the intervention groups had a 51% lower incidence of diabetes than did people in the control group. After 20 years, the intervention groups sustained a 43% lower diabetes incidence, and people in the intervention groups were diabetes-free for almost 4 years longer than people in the control group. The interventions did not seem to affect the risk of cardiovascular disease and other diabetic complications.

The World Health Organization estimates that at least 180 million people worldwide are living with diabetes. The risk of type 2 diabetes is higher in people with a family history of the disease; being overweight, having high triglycerides (a fat in the blood), and high blood pressure also raise risk.

Simple steps to protect your blood sugar

Dr. Leon Hecht, a New Hampshire naturopathic doctor specializing in diabetes, offers these tips for stabilizing blood sugar and avoiding diabetes and related problems.

• Focus your diet on whole foods, including vegetables, fruits, whole grains, lean animal proteins, legumes, nuts, and seeds.

• Eat a larger breakfast and a smaller dinner.

• Each day, make one meal a large salad with all the fixings.

• Decrease foods with flour in them—this means all cakes, cookies, and breads—as these foods will raise your need for insulin, causing you to store fat.

• Aim to lose abdominal fat, as weight in this area is a principal risk factor for type 2 diabetes.

(Lancet 2008;371:1783–9)

Healthnotes Newswire (June 19, 2008)—Childhood and teen obesity has leveled out, according to statistics from 2006. But it’s not time to celebrate yet—there is work to be done to reverse the trend and help kids become healthier. A new study reports that overweight and obesity rates in kids have not changed since 1999, giving us reason for both optimism and concern.

The study, published in the Journal of the American Medical Association, included data from the National Health and Nutrition Examination Survey, which has been conducted in multiple stages by the National Center for Health Statistics and the Centers for Disease Control and Prevention (CDC) since the 1960s. The researchers used health information collected from 2003 to 2006 for 8,165 children and adolescents ages 2 to 19. Body mass index (BMI) was calculated for each child and placed on the percentile graphs for boys and girls established in 2000 by the CDC.

What researchers found when the children weighed in

The surveys found:

• 11.3% of children and adolescents had an extremely high BMI, falling at or above the 97th percentile for their age

• 16.3% were obese, with BMI at or above the 95th percentile

• 31.9% were overweight, having BMI at or above the 85th percentile

• Children between 12 and 19 years old were more likely to have high BMI than younger children

• Mexican–American boys and girls and non-Hispanic black girls had higher BMI than non-Hispanic white boys and girls

When the researchers compared these percentages to those from previous surveys, no real change was seen since nearly a decade ago.

Based on data from older surveys, the trend in childhood overweight and obesity was clearly upward from 1980, when only 6.5% of children ages 6 to 11 were obese. By 1994 that number had risen to more than 11%, and by 2002, it had climbed to more than 16%, where it seems to have reached a plateau.

An opportunity to outpace obesity

Although the reasons for the change in trend is not yet known, we do know that some behaviors can help children avoid becoming overweight and obese. Taking steps when your children are young will help them develop positive habits that will keep them healthy into adulthood.

• Avoid fast foods, which are high in calories and fat. Home-cooked meals made with whole grains and lots of vegetables will help your family stay healthy.

• Watch the portions. Portion sizes of prepared foods are large and growing. Eat at home and try letting your children serve themselves. We tend to eat what’s put in front of us, but left to dish out their own food, children tend to take and eat smaller portions.

• Skip sugary soft drinks. These add empty calories in the form of high-fructose corn syrup, implicated in the rising trends in overweight, obesity, and type 2 diabetes.

• Keep kids active and limit screen time—including television, movies, and computers.

Healthcare professionals who work with children agree that these rates need to come down before we can breathe a sigh of relief. Said Cynthia Ogden, PhD, the study’s lead author and an epidemiologist at the National Center for Health Statistics, “It doesn’t mean we’ve solved it, but maybe there is some opportunity for some optimism here.”

(JAMA 2008;299:2401–5)

Healthnotes Newswire (June 12, 2008)—A cup of ginger tea is often just the thing to settle an upset stomach—but little is known about how it actually works. A new study, published in the European Journal of Gastroenterology and Hepatology, found that ginger stimulates digestion by speeding up the movement of food from the stomach into the upper small intestine.

Soothing to the stomach

After having nothing to eat or drink for eight hours, the 24 healthy men in the study were given either 1,200 mg of ginger or placebo, and then ate a bowl of soup. They answered questions about their digestive comfort, and digestive activity was measured by ultrasound. One week later, they repeated the test, but the ginger and placebo groups were reversed.

Muscle contractions in the stomach, which help to move food into the upper small intestine, were more frequent and the stomach emptied more quickly after ginger than placebo. After eating the soup, mild digestive discomfort was reported in those who had placebo but not ginger.

From the kitchen to your medicine cabinet

Ginger (Zingiber officinale) is popular as a culinary spice and as a medicinal herb. It is used all over the world to treat indigestion, gas and bloating, nausea, diarrhea, and irritable bowel syndrome. A well-known remedy for nausea during pregnancy and motion sickness, ginger has also has anti-inflammatory effects that make it a good choice for treating arthritis.

“Since low gastric motility has been associated with the digestive symptoms for which ginger is frequently used, if ginger improves the movement of food through the upper digestive tract in people with digestive problems, this could help to explain how it exerts its benefits,” said Dr. Rebecca Chollet, a naturopathic doctor who practices in New Hampshire and Vermont.

Ginger is often taken as tea, prepared by simmering the cut root in a covered pot. It can also be used as tincture (an alcohol-based extract), in capsules (as in this study), or added to common gas-producing foods like beans and lentils to prevent gas. At times when nausea makes eating or drinking difficult, crystallized ginger can be used like a lozenge.

A multifaceted approach may help your digestion

Other methods for preventing indigestion include eating slowly and being careful not to overeat. Like ginger, caraway, cumin, and fennel can be added to foods to reduce the chance of developing gas after eating. Digestive enzyme supplements are sometimes helpful when these measures are not enough.

(Eur J Gastroenterol Hepatol 2008;20:436–40)

Healthnotes Newswire (June 12, 2008)—As the summer solstice approaches, many of us notice how much long, sunny days can lift the mood. New research suggests there may be a physiological basis for this phenomenon. A recent study found that people with minor or major depression had lower vitamin D levels than people without depression.

The study, published in the Archives of General Psychiatry, was conducted in the high-latitude country of the Netherlands (where sun exposure is limited) and included people age 65 and older. Vitamin D levels in 169 people with minor depression and 26 people with major depression were compared with those from 1,087 people without depression.

Vitamin D levels were 14% lower in the people with major and minor depression compared with nondepressed people. Levels of parathyroid hormone, the hormone that helps regulate calcium levels in the body, was 5% higher in people with minor depression and 33% higher in people with major depression. When vitamin D levels are low, parathyroid hormone levels tend to rise, and high levels of this hormone have been linked to depression in the past.

D is for daylight

Vitamin D, produced through a chemical reaction that begins in sun-exposed skin cells, plays a critical role in calcium metabolism by increasing the absorption of dietary calcium and decreasing the amount of calcium lost through urine. Long known to be necessary for healthy teeth and bones, recent evidence has pointed toward its importance in preventing depression and some cancers.

Older people tend to spend less time outside than younger people, and many don’t get adequate sunshine, making them more susceptible to vitamin D insufficiency and deficiency. In the current study, almost 39% of men and 57% of women had levels of vitamin D that are considered insufficient, which means they were low but not low enough to be called deficient. The rate of depression in older people, estimated to be about 13%, is higher than in younger people.

Easy does it

“The dilemma is that sun exposure without sunscreen, which is necessary for vitamin D production, increases the risk of skin cancer,” commented Dr. Julianne Forbes, a naturopathic doctor who practices in Maine.((Same comment as on other.)) “Be sensible—cover up or use sunscreen if you plan to be in the sun for an extended period, but don’t be afraid to head out for a short walk or get short bursts of sun exposure over the course of an ordinary day.”

People can take several steps to prevent depression:

• Stay active—There is a wealth of research demonstrating a link between inactivity and depression.

• Avoid too much alcohol, which is a natural depressant.

• Eat foods rich in folic acid and vitamin B12, especially if you’re an older adult. Deficiencies in both of these vitamins are more common in seniors and are linked with depression.

• Get a little sunshine when possible, and consider supplementing with 1,000 IU of vitamin D per day, especially in the winter and if you live in a northern latitude.

(Arch Gen Psychiatry 2008;65:508–12)

Healthnotes Newswire (June 5, 2008)—Skin affected by eczema might seem to be crying out for creams and salves to ease itching and inflammation, but what’s on the inside might be more important than what’s on the outside. A new study found that supplementing with the omega-3 fatty acid DHA (docosahexaenoic acid) helped relieve symptoms in people with eczema.

In the study, published in the British Journal of Dermatology, 44 adults with eczema received either 5.35 grams of DHA per day or placebo for eight weeks. At the study’s beginning, mid point, and end, scores were given to each person based on symptom severity, including the size of the affected area, redness, swelling, crusting, scabbing due to scratching, thickening, dryness, itching, and sleeplessness.

Symptom scores in people using DHA improved over the course of the study, but scores for those in the placebo group did not change significantly. In particular, the size of the affected area decreased 42% in the DHA group but did not change in the placebo group.

Eczema is a common inflammatory skin condition that is typically treated with topical and occasionally oral steroids. People with eczema often have other inflammatory conditions such as asthma, allergies, and food sensitivities. Many people with eczema notice that flare-ups can be triggered or exacerbated by stress.

DHA and EPA (eicosapentaenoic acid) are the omega-3 fatty acids found primarily in fish. Their anti-inflammatory effects are well established, and a number of studies have found that fish oil or EPA-DHA combinations are effective in treating conditions such as rheumatoid arthritis, Crohn’s disease, asthma, and cardiovascular disease. One previous study found that taking about 2 teaspoons of fish oil per day reduced symptoms in people with eczema.

“Our findings suggest that DHA might be helpful in supporting the standard treatment of eczema,” commented the principal investigator of the study, Dr. Margitta Worm, at the Charite-Universitatsmedizin in Berlin, Germany. “This is the first study to look at DHA alone in the treatment of eczema, so more research is needed to confirm our findings and identify the amount that would result in greatest improvement.”

Save your skin

People with eczema can take the following steps to reduce their symptoms:

• Identify food sensitivities and avoid reactive foods. Some of the most common reactive foods in people with eczema are wheat and other grains with gluten, dairy, eggs, and corn, including corn syrup.

• Manage stress through exercise and relaxation.

• Supplement with 3 grams per day of evening primrose oil or 2 or 3 teaspoons per day of sunflower or safflower oil, which have anti-inflammatory omega-6 fatty acids.

• Eat plenty of cold-water fish that are rich in EPA and DHA such as salmon, tuna, mackerel, sardines, and herring. Or consider a supplement with these omega-3 fatty acids.

(Br J Dermatol 2008;158:786–92)

Healthnotes Newswire (May 29, 2008)—The President’s Council on Physical Fitness and Sport recently released a fitness test for people over age 18. The test helps estimate aerobic fitness level, muscle strength and endurance, flexibility, and body composition.

Better overall physical fitness helps lower the risk of cardiovascular disease, diabetes, high blood pressure, stroke, and certain cancers. It can also improve mood and help avoid accidents and muscle strain due to underused and inflexible muscle groups.

The new President’s Challenge and Adult Fitness Test was created to help people understand their own fitness level and make positive gains in physical fitness. The test is available as a downloadable booklet at www.adultfitnesstest.org/resources/testbooklet.pdf; individual results can be entered and evaluated online.

Each test section is followed by a “FITT” box which stands for Frequency—how often the exercise is performed; I—the intensity at which the exercise is carried out; T—time, or how long the session lasts; and T—type of exercise being performed. These boxes help users customize their fitness goals.

Aerobic Fitness

To test aerobic, or cardiovascular, fitness, choose a 1-mile walk or a 1.5-mile run. For the walk, after a brief warm up, have a partner time you walking at a brisk pace for one mile, and take your pulse immediately after finishing. For the running option, warm up with a light jog. Then, having a partner time you, run as fast as possible for 1.5 miles. Only attempt the run if you currently run for at least 20 minutes three or more times per week.

FITT tips

Frequency: Depending on the level of intensity, exercise three to five days per week.

Intensity: Moderate-intensity exercise is a brisk walk; vigorous activity is running.

Time: For moderate activity, do at least 30 minutes per session; vigorous activity should last for 20 to 30 minutes.

Type: Examples are walking, running, dancing, cycling, and swimming.

Muscular Strength and Endurance

These tests assess basic muscle strength required to carry out household or work-related tasks. Do half sit-ups by lying face-up on a rug or mat with knees bent at a right angle and feet flat on the floor. With palms flat on the floor, sit up and slide hands forward 3.5 inches (mark distance with masking tape on the working surface before starting). Having a partner time you, do as many sit-ups as you can in one minute. Then do push-ups with legs extended (men) or with knees touching the floor (women). Do as many push-ups as you can and record the number.

FITT tips

Frequency: Do muscular strength and endurance exercises on at least three days per week.

Intensity: Vary the intensity during the workout.

Time: Gradually increase the number of half sit-ups and push-ups until you can do three sets of 25 half sit-ups and three sets of 10 to20 push-ups.

Type: Master the test movements and then add other equipment (balance balls, weights, or elastic tubing).

Flexibility

These tests assess the range of motion of muscles needed to walk, lift, and step normally. Sitting on the floor, place a yardstick between the legs with feet about a foot apart. Place a piece of tape across the yardstick at the 15-inch mark. With fingers on the yardstick, slowly reach forward as far as possible. Record to the nearest inch that your fingertips can reach.

FITT tips

Frequency: Do flexibility exercises at least three days per week.

Intensity: Stretch to the point of tension, never to pain.

Time: Hold each stretch for 20 to 30 seconds, repeating three times.

Type: Begin with static stretches, gradually adding dynamic (moving) stretches. Try learning a practice that includes flexibility exercises, such as yoga and Pilates.

Body Composition

Body mass index (BMI) and waist circumference can be measured to estimate disease risk. To calculate BMI, weigh yourself and have a partner measure your height with shoes off. Wrap a flexible tape measure around your abdomen just above the hip bones; measure and record. Determine your BMI using the booklet’s chart.

A normal BMI is between 18.5 and 24.9; overweight is between 25 and 29.9; obese is greater than 30.

If you are overweight or obese, you can improve your BMI and waist circumference by making sure that you burn more calories than you eat. In order to lose weight, emphasize whole grains, fiber, fruits and vegetables; limit processed and high-carb, high-fat foods, and work in 60 to 90 minutes of daily moderate intensity exercise.

(www.adultfitnesstest.org/adultFitnesstestLanding.aspx; accessed 26 May 2008.)

Healthnotes Newswire (May 29, 2008)—If you want to help your kids do better in school, you can start by providing them with healthy food. A new study has found that a high-quality diet is linked to a higher level of academic performance in schoolchildren.

The researchers surveyed 5,200 fifth-graders and their parents for the study, published in the Journal of School Health, and used the information to calculate a score for each child’s diet that represented nutrient content; food variety; balance of protein, fat, and carbohydrate; and the amount of saturated fat, salt, and junk food eaten. Academic performance was measured using a standardized reading and writing test.

Children who had the highest diet quality scores—and therefore the healthy diets—were 41% less likely to fail the literacy test than children with the lowest diet quality scores, which indicated poor diets. Variety and adequate nutrition were linked with academic performance, and children who ate more fruits and vegetables and fewer calories from fat did better on the test.

“Dietary adequacy and variety were the specific factors found to positively influence academic performance, highlighting the value of eating a diverse array of foods in order to reach recommended levels of intake for nutrients and foods,” said study coauthor, Dr. Paul Veugelers, at the School of Public Health, University of Alberta, Canada.

Previous research showing that eating a healthy breakfast can help children do better in school influenced the widespread implementation of school breakfast programs. Other studies have found that being overweight or obese has a negative influence on academic performance, suggesting that school programs emphasizing both healthy eating and physical exercise might have the best effect on raising achievement in school.

Tips to build your kids’ brainpower

Parents can take the following steps to improve their children’s likelihood of doing well in school:

• Make sure your children get to bed on time and get plenty of sleep.

• Start them out with a healthy breakfast, including whole grains and fruits.

• Pack healthy foods to take to school, including whole grain bread for sandwiches, vegetables, fruits, and nuts and seeds.

• Make dinner a family affair and keep it wholesome and varied, introducing new foods to kids on a regular basis.

• Turn off the television, computer, and video games and encourage your kids to be active.

Establishing good habits early in life will help your children to be successful now and in the future.

(J Sch Health 2008;78:209–15)