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Obesity May Raise Kids' Allergy Risk
Using Music and Sports to Improve Kids' Asthma
Air Pollution May Raise Blood Pressure
ALTERNATIVE MEDICINE
Taking the Mystery Out of Hypnotherapy
Meditation, Yoga Might Switch Off Stress Genes
Uncover Why Turmeric Helps You Heal
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Animals Respond to Acupuncture's Healing Touch
Separation Anxiety, Canine-Style
Safe Toys for Dogs
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Improved Hip Implants Can Last 20 Years
Majority of College Students Report Backpack-Related Pain
Barefoot Lifestyle Has Its Dangers
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More Cancer Tests Mean More False-Positive Results
Higher Vitamin D Intake Could Cut Cancer Risk
Smokeout '08: The Perfect Time to Quit
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Caregivers Face Multiple Strains Tending Older Parents
Falls Are Top Cause of Injury, Death Among Elderly
Tiniest Babies Carry Biggest Costs
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Exercise Extends Life of Kidney Patients
Smog Tougher on the Obese
Exercise May Blunt Salt's Effect on Hypertension
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Health Tip: After Liposuction
Study Evaluates Laser Therapies for Hair Removal
New Genetic Links to Baldness Discovered
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Mom's Vitamin D Levels Affect Baby's Dental Health
Laser Technology Spots Cavities Before They Start
Toothbrushing May Stave Off Heart Woes
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Diabetes Linked to Cognitive Problems
Coffee, Tea Might Stave Off Diabetes
Whole Grains Take a Bite Out of Type 2 Diabetes Risk
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DASH Diet Has Extra Benefits for Women's Health
Want to Stop Cancer? You Can, Experts Say
Shedding Light on Why Omega-3 Fatty Acids May Help the Heart
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Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
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Years of Exposure to Traffic Pollution Raises Blood Pressure
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Exposure to 9/11 Fumes Tied to Chronic Headaches
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FDA Goes After Unapproved Eye Washes, Skin Ointments
Unconscious Learning: In the Eye of the Beholder?
Retinal Gene Is Linked to Childhood Blindness
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As Temperature Plummets, It's Still Safe to Exercise
You Can Get Great Exercise In The Garden
Exercise Cuts Lung Cancer Risk in Ex-Smokers by 45%
GASTROINTESTINAL PROBLEMS
Soothing Imagery May Help Rid Some Kids of Stomach Pain
Japanese Herbals May Ease Gastro Woes
Bowel Prep Harder on Women Than Men
GENERAL HEALTH
Winter's Bitter Cold Poses Health Dangers
Study Supports Swine Flu's Pandemic Potential
Any Old Cane Won't Do
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Many Children Will Outgrow Headaches
Ski Helmets Encouraged for All
Zen May Thicken Brain, Thwart Pain
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'Comfort Dogs' Come to Emotional Rescue
'Cell Phone Elbow' -- A New Ill for the Wired Age
Using Light Therapy to Silence Harmful Brain Activity
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Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
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Coffee Is Generally Heart-Friendly
Women Who Run May Benefit From Extra Folic Acid
Implanted Defibrillators Boost Long-Term Survival
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Bacterial Infections May Succumb to Honey
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
Swine Flu Loves a Crowd
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Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Even Young Kids Can Learn CPR
Breast-Feeding May Protect a Woman's Heart
Stomach Germ May Protect Against Asthma
MEN'S HEALTH
Vigorous Exercise Cuts Stroke Risk for Men, Not Women
Low Vitamin D Levels May Boost Men's Heart Attack Risk
Strenuous Daily Workout May Keep Cancer at Bay
MENTAL HEALTH
Brain Scans Show How Humans 'Hear' Emotion
The 3LS Wellness Program for Reversing Chronic Symptoms and Creating Lasting Health
Vitamin C Protects Some Elderly Men From Bone Loss
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Are We Exercising Pain Away? Not So Much.
Acupuncture, Real or Fake, Eases Back Pain
'Cell Phone Elbow' -- A New Ill for the Wired Age
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PREGNANCY
Exercise Boosts Bone Density in Breast-Feeding Moms
Exercise As Well As Acupuncture, May Ease Polycystic Ovarian Syndrome
Pre-Pregnancy Weight Linked to Babies' Heart Problems
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Exercise Benefits Even the Oldest Old
Community Exercise Programs Boost Seniors' Strength
Friends, Not Grandkids, Key to Happy Retirement
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SLEEP DISORDERS
Moderate Aerobics May Ease Insomnia Symptoms
Sleeping Could Help Women Lose The Baby Fat
Pay Attention to Signs That Say You're Too Fatigued to Drive
WOMEN'S HEALTH
Active Young Women Need Calcium, Vitamin D
Health Tip: Be More Comfortable During Childbirth
Prenatal Stress May Boost Baby's Asthma Risk
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Potassium-Rich Foods May Cut Stroke, Heart Disease Risk

A diet rich in foods that are loaded with potassium can reduce your risk for a stroke by 21 percent and may also lower your risk of heart disease, a new study suggests.

Good sources of potassium include bananas and other fruits and vegetables, as well as fish, poultry and dairy, the researchers noted.

And ounce per ounce, sweet potato and tomato paste top the list, according to the U.S. Department of Agriculture.

"The average dietary potassium intake in most countries worldwide is much lower than recommended by health authorities, and increasing potassium intake may provide protection against stroke and other cardiovascular disorders," said lead researcher Dr. Pasquale Strazzullo, a professor of medicine at the Federico II University of Naples Medical School, in Italy.

The report is published in the March 1 online edition of the Journal of the American College of Cardiology.

For the study, Strazzullo's team pulled data about potassium and cardiovascular disease from 11 studies, which included a total of 247,510 men and women. The researchers looked at what people in these studies recalled eating in the past day.

This process is called a meta-analysis, in which researchers look for trends in the data that may support a particular conclusion, even when these data were not the main point of the study.

They found that people who consumed 1.64 grams of potassium or more a day had a 21 percent lower risk of stroke and also tended to have a lower risk of any cardiovascular disease.

Strazzullo noted that five or more servings of fruits and vegetables will provide the amount of potassium needed to get this protective effect.

"The protective effect of potassium against the risk of stroke and other vascular events may in part be traced to its blood pressure-lowering effect, particularly in hypertensive individuals and in those with elevated sodium intake," Strazzullo said.

However, other processes appear to be at work as well, he added. For example, potassium may be involved in slowing the process of atherosclerosis and preventing the thickening of the walls of arteries, all of which can lead to cardiovascular disease.

"More recently, a high-potassium diet was shown to exert a protective effect against the development of vascular damage induced by excess salt intake, thus counteracting, to some extent, the dangerous effects of eating too much salt. This large body of evidence from experimental studies provides biological plausibility to the protective effect of dietary potassium against cardiovascular events," Strazzullo said.

A higher potassium intake is safe for most people, Strazzullo said, adding that there might be some concern about elevated potassium for patients with kidney failure or those taking medicines that lower potassium. In those cases, patients should speak with their doctors, he added.

Dr. Larry B. Goldstein, director of the Duke Stroke Center at Duke University Medical Center, commented that "this is completely consistent with current American Heart Association dietary recommendations."

The best example is the DASH-type eating plan, which has been tested in various studies, he said. "The DASH diet is rich in fruits and vegetables and nuts, moderate in low-fat dairy products, low in sodium and high in potassium. The effect on stroke is likely mediated, at least in part, through lower blood pressure," Goldstein said.

Another expert, Dr. Gregg Fonarow, spokesman for the American Heart Association and professor of cardiology at the University of California, Los Angeles, added that "clinical trials have established that a diet high in potassium and low in sodium can significantly lower blood pressure."

Because high blood pressure is one of the major risk factors for heart disease and stroke, it follows that higher-potassium diets would be linked to lower risk of stroke and heart attacks, he said.

"However, a higher-potassium diet potentially has other mechanisms of benefit, including protecting blood vessels from oxidative damage and limiting thickening of the blood vessel wall," Fonarow said.

Increasing potassium in the diet while limiting sodium may help to reduce the risk of stroke and confer other cardiovascular benefits, he said. "Fruits such as bananas, cantaloupe, grapefruit, oranges, vegetables like tomatoes and low-fat dairy products are a good source of dietary potassium," he said.

More information

For more information on the best sources of potassium, visit the U.S. National Library of Medicine.

SOURCES: Pasquale Strazzullo, M.D., professor, medicine, Federico II University of Naples Medical School, Italy; Larry B. Goldstein, M.D., professor, medicine, and director, Duke Stroke Center, Duke University Medical Center, Durham, N.C.; Gregg Fonarow, M.D., spokesman, American Heart Association, and professor, cardiology, University of California, Los Angeles; March 1, 2011, Journal of the American College of Cardiology, online