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High Blood Pressure, Salt, and Potassium

High Blood Pressure, Salt, and Potassium

July 4, 2014 1 Comment 9700 views

High blood pressure, also known as hypertension, is a common condition that affects 1 in every 3 adults in the United States.  Although hypertension typically has no signs or symptoms, it can lead to serious complications such as heart attack, stroke, heart failure, and kidney failure.

In this “Ask the Paleo Nurse” question and answer segment, Katy helps a reader that has high blood pressure sift through recommendations regarding the consumption of salt and the role of potassium in the management of hypertension.

Reader Question about High Blood Pressure, Salt intake, and Potassium: 

I have high blood pressure and I’ve been following the Paleo diet for 2.5 years now. Paleo has helped a bit to lower my blood pressure, but I still have to take a blood pressure medication to manage it.

I’ve been told that I should follow a low-salt diet in order to keep my blood pressure under control.  Is it still okay to use natural sea salt?  Also, is it true that foods high in potassium can help to lower blood pressure?

Answer:

In its unprocessed state, salt is a naturally-occurring mineral compound that consists mostly of sodium chloride and trace amounts of other minerals, such as silicon, phosphorous, and bromine.

Although the conventional medical community has long advised patients with hypertension to consume low-salt diets, there is little evidence to support that reducing salt intake results in a clinically significant decrease in blood pressure or decreases the risk of complications of high blood pressure.

A report released in 2013 by the Institute of Medicine concluded that the quality of evidence linking salt to poor health outcomes is lacking. A close examination of several randomized trials actually revealed worse health outcomes in those consuming very low salt diets.

A Cochrane review conducted in 2011 found that there was no clinically significant impact of dietary salt intake reduction on mortality or complications from cardiovascular disease.

However, not all salt is created equal and there are still good reasons to avoid table salt and the salt found in high amounts in refined foods. Table salt is highly processed and contains a far less diverse mineral composition than that of natural sea salt.

Man-made chemicals and preservatives are also added to table salt as anti-caking and free-flowing agents. A nutrient-dense Paleo diet drastically decreases the amount of processed salt consumed by eliminating refined foods and added table salt.

If you are following a Paleo diet, it is likely safe, and perhaps even health-promoting, to consume a small amount of natural sea salt for seasoning and flavor—as long as the natural sea salt intake is balanced with other important minerals and nutrients.

Along with sodium, potassium is a mineral that plays a critical role in blood pressure regulation. It’s the balance between sodium and potassium that controls fluid status in the body, thus impacting blood pressure.

Rather than the potential effects of consuming too much salt alone, long-term population studies have suggested that it is an imbalance in the ratio of sodium to potassium that contributes to hypertension-related complications. In other words, the problem is not just eating too much salt, but it’s not getting enough potassium to balance the amount of sodium in the diet.

Increasing the consumption of foods that are high in potassium can have a beneficial impact on lowering blood pressure.  Paleo foods that are naturally high in potassium include beet greens, Swiss chard, sweet potatoes, spinach, avocado, Brussel sprouts, cantaloupe, cabbage asparagus, and carrots.

Interesting, all of these foods are higher in potassium than the banana, which is widely known for its potassium content (see this resource for other foods that are high in potassium). As you are taking blood pressure medication, you should be aware that consuming foods that are high in potassium is contraindicated when taking certain blood pressure medications known as potassium-sparing diuretics. Too much potassium can be life-threatening, so make sure that you talk about your diet and the medication with your health care provider.

In the “Ask the Paleo Nurse” feature, Katy Haldiman, Health Director of Paleo Movement Magazine, registered nurse, and certified nutritional therapist, answers your health and nutrition-related questions. Have a question of your own?  Submit it to katy@paleomovement.com.  

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Katy Haldiman, MS, RN

Katy Haldiman, MS, RN

Katy Haldiman, MS, RN is a functional health registered nurse and certified nutritional therapist. Katy earned a Bachelor of Science in Nursing degree from the Ohio State University and a Master of Science in Health Care & Nursing Administration degree from the University of Michigan. Her education as a nutritional therapist is through the Nutritional Therapy Association and she is certified as a health and fitness specialist by the American College of Sports Medicine. After several years of practicing in the conventional health care system, Katy discovered the Paleo lifestyle as a way of eliminating symptoms of her own gastrointestinal and autoimmune disease. Now, Katy's mission is to help others make healing changes in their own lives through the power of real food and other ancestral health techniques. Katy is co-creator of Paleocare: The Nurses' Guide to Real Food and co-host of the Paleocare Podcast. She consults with clients in the San Francisco Bay Area and all over the world via Skype and telephone. You can find Katy at www.thepaleonurse.com and www.paleocare.com.

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Comments

  • Robert Robert August 01, 07:59

    Good point.. now that we've cut back on processed foods and junk food, we might need a bit more salt in our diet!

    Reply
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