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Potassium Crucial for Heart Health

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Looney Toons cartoons may lead us to believe that banana peels are just about the most dangerous food item on the planet, but a new report from Reuters Health stresses the important role the actual banana plays in our health.

A University of Texas Southwestern Medical Center in Dallas study observed a multi-ethnic population-based group of 3,303 adults, finding that a low potassium level in the urine correlated with high blood pressure, regardless of the level of sodium in the diet or other known cardiovascular risk factors.

Dr. Susan Hedayati, lead author of the study, stated that "The lower the potassium in the urine, hence the lower the potassium in the diet, the higher the blood pressure." Surprisingly, "This effect was even stronger than the effect of sodium on blood pressure," said Dr. Hedayati.

And this, of course, brings us back to that trusty banana. Packed with about 450mg of potassium, a medium-sized banana provides 10 percent of the recommended daily amount for adults at only 109 calories each.

Not much of a banana person? No need to worry, as there are plenty of other foods that pack a strong potassium punch. Here are just a few:

  • oranges
  • grapefruit
  • potatoes
  • tomatoes
  • spinach
  • beans
  • milk
  • yogurt
  • Brazil nuts
  • salmon
  • cod

So, to keep your ticker ticking, and to help ensure total body health, be sure you're getting enough potassium in your diet. And, to be extra careful, do be careful not to step on any rogue banana peels.

More like this in Food and Health · Nov 18, 2008
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15 Comments

Heather on 11/18/08

It always surprises me bananas are the potassium go-to food when so many other foods have so much more potassium per serving. Bananas are more an average source.

Of course, I love bananas... just that is odd to me.

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Tina on 11/18/08

Most other potassium rich foods need to be prepared in some way, bananas are easy and ready-to-eat when you feel the need for a quick potassium fix.

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Kami Gray on 11/18/08

Bananas are also portable! Great reminder to get enough potassium and where to find it...High blood pressure can lead to many life-threatening and debilitating problems like stroke. It runs in our family. I have found that while getting enough potassium is important, to really see your blood pressure drop significantly, you need regular cardiovascular exercise. For me, it's the difference between borderline hypertension and normal blood pressure readings.

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Alvin on 11/18/08

Not to mention, bananas are great energy boosters too! :)

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Alex Baran on 11/18/08

A daily dose of pistachios can have benefic effects by reducing the risk of developing cardiovascular disease. I read at http://www.projectweightloss.com/index.php avout a study, conducted by researchers at the George Mason University in cooperation with specialists from Inova Fairfax Hospital. The study involved patients with moderate-to-high levels of cholesterol. The patients followed a diet with fifteen percent of their daily calorie intake coming from pistachios.

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Blake on 11/18/08

Good thing I love bananas!

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Spectra on 11/18/08

I'm not much of a banana person, but I eat lots of spinach and tomatoes and yogurt. My mom thinks I'm going to pass out from lack of potassium because I don't eat bananas and I work out quite a bit.

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Cecilia on 11/18/08

Bananas really are amazing. I've been eating a banana a day for years now to control my low blood pressure and low blood sugar. I used to pass out all the time and I had dizzy spells until I started eating bananas. I thought it was the sugar, but other sugary fruits or deserts didn't have the same effect, so I figured it was the potassium and started eating more of it in other foods too and I was fine again.
But there is one thing I don't understand; the article says that the less potassium you eat, the high your blood pressure is, but eating MORE potassium raised mine. Maybe I'm the oddball but it's got me confused.

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Susan on 11/19/08

Bananas are truly the best. Good for you and transportable! Not to mention they are delicious too!

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Jerry on 11/20/08

And bananas contain resistant starch, which ferments in the large intestine, creating by-products that block conversion of some carbohydrates into fuel, so replacing ordinary carbs with the resistant starch in bananas can boost fat burning. Also banana fiber bulks up in the stomach, so you feel full for longer. There’s a good description of the science at http://www.dolenutrition.com/articleDetails.aspx?RecId=36&txtsearch=potassium&orderby=&CatId=

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medical information on 11/24/08

Hi! Thanks for sharing this post! Very informative! :D

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Melissa Herrmann Dierks/Eat Smart Nutrition Co. on 11/24/08

The results of this study are not new to Registered Dietitian's; we've know for years that a diet high in potassium with lot of fruits, vegetables, and whole grains has a positive effect on blood pressure. The DASH diet was created based on this knowledge. As stated above, bananas are probably often mentioned as a good source of potassium because they are widely available, popular, and portable. However many fruits, vegetables, whole grains, and dairy products are also a good source of potassium. Another option to increase your potassium intake is with vitaminwater which is enhanced with potassium, calcium, and magnesium, and provides four B vitamins and 100% of the daily value of vitamin C in each bottle. The Revive flavor provides 350mg of potassium, which gives you a great tasting, portable potassium source. At 50 calories/8oz, vitaminwater provides less calories than some of the fruit and vegetable choices listed above. The key is to get a variety in your diet, plenty of fruits, vegetables, whole grains, lean protein, and low fat dairy products. Hydrate responsibly, vitaminwater is a great tasting choice without the "artificials"-no artificial sweeteners, colors, flavors etc.

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Jody on 12/18/08

I Came across your site this morning and agreed with you. My son had a kidney disease, one of the foods he had to have each day was 1/2 of a banana.

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jphales on 12/28/08

How many bananas are too many a day though? Or a week? My husband eats 2 to 4 a day and I'm worried he is eating too many and this may be too much potassium.

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sandy on 02/16/09

I recently discovered I had a potassium problem. I work out six days a week...3 days cardio, 3 days resistance training. I've lost 15 pounds but suddenly my blood pressure shot up and I felt weak and tired much of the time. I asked the trainers at the gym if people who work out needed more potassium and they assured me that it didn't! I did some on line research and found that not to be true. I have changed my diet to include orange juice, v-8 juice, celery and other potassium rich foods. A banana is low on the list compared to celery! I am feeling better already and I expect my blood pressure to go down accordingly.

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