Featured Research

from universities, journals, and other organizations

Hidden Phosphorus Food Additives Dangerous To Kidney Disease Patients

Date:
February 20, 2009
Source:
Case Western Reserve University
Summary:
Advanced kidney disease patients have a list of foods they know to avoid because they naturally contain a high level of the mineral phosphorus, which is difficult for their compromised kidneys to expel. But researchers have discovered that a great deal of processed and fast food actually contains phosphorus additives which can be just as dangerous for these patients.

Advanced kidney disease patients have a list of foods they know to avoid because they naturally contain a high level of the mineral phosphorus, which is difficult for their compromised kidneys to expel. But researchers from MetroHealth Medical Center and Case Western Reserve University School of Medicine in Cleveland have discovered that a great deal of processed and fast food actually contains phosphorus additives which can be just as dangerous for these patients.

Related Articles


High blood levels of phosphorus can lead to heart disease, bone disease, and even death among patients with advanced kidney disease. This is why these patients must avoid foods with naturally high levels of phosphorus – such as certain meats, dairy products, whole grains, and nuts. The research team discovered that it has become an increasingly common practice by food manufacturers to include phosphorus additives, such as sodium phosphate or pyrophosphate, to processed foods. The additives are used to enhance flavor and shelf life –particularly in meats, cheeses, baked goods, and beverages – and it is very difficult for American consumers to know whether or not these additives are present in products.

"Calories, fat, and sodium content are required to be listed on nutrition labels, but phosphorus is not," says Catherine Sullivan, M.S., R.D., lead researcher from the Center for Reducing Health Disparities, a joint center created and operated by MetroHealth and Case Western Reserve University. "This makes it impossible for kidney disease patients to know how much phosphorus they are eating. For example, we discovered that while chicken is often on dialysis patients' 'Safe List' of foods to eat, chicken from fast food and sit down restaurants often contains this phosphorus additive."

The researchers found they were able to significantly lower phosphorus levels among advanced kidney disease patients once they were taught to avoid foods containing phosphorus additives.

The investigators randomly assigned 279 advanced kidney disease patients receiving dialysis treatment to a control group that received usual care or to an intervention group that was taught to avoid additive-containing foods when purchasing groceries or eating at fast food restaurants. After three months, phosphorus levels declined two and a half times more in the intervention group than in the control group (0.4 vs. 1.0 mg/dL).

The study findings are most relevant to the half a million Americans with advanced kidney disease and the 10 million more with moderate kidney disease. However, the study authors note that even people with normal kidney function may be affected by these additives since previous research has found that high phosphorus diets appear to lower bone density and increase fracture risk as well.

"Phosphorus is already abundant in naturally-occurring foods," says study co-investigator Srilekha Sayre, M.D., M.S., MetroHealth and Case Western Reserve University. "By adding even more phosphorus to our food supply, we may be exceeding the body's regulatory ability, especially for those with kidney disease. We need to limit the use of these additives until their impact is better understood or at least encourage the Food and Drug Administration to require food manufacturers to report phosphorus content on nutrition food labels."


Story Source:

The above story is based on materials provided by Case Western Reserve University. Note: Materials may be edited for content and length.


Cite This Page:

Case Western Reserve University. "Hidden Phosphorus Food Additives Dangerous To Kidney Disease Patients." ScienceDaily. ScienceDaily, 20 February 2009. <www.sciencedaily.com/releases/2009/02/090210161912.htm>.
Case Western Reserve University. (2009, February 20). Hidden Phosphorus Food Additives Dangerous To Kidney Disease Patients. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2009/02/090210161912.htm
Case Western Reserve University. "Hidden Phosphorus Food Additives Dangerous To Kidney Disease Patients." ScienceDaily. www.sciencedaily.com/releases/2009/02/090210161912.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hikers Rescued After Fall from Oregon Mountain

Hikers Rescued After Fall from Oregon Mountain

AP (Feb. 1, 2015) Two climbers who were hurt in a fall on Mount Hood are now being treated for their injuries. Rescue officials say they were airlifted off the mountain Saturday afternoon by an Oregon National Guard helicopter. (Feb. 2) Video provided by AP
Powered by NewsLook.com
Smart Glasses Augment Reality to Help Visually Impaired

Smart Glasses Augment Reality to Help Visually Impaired

Reuters - Innovations Video Online (Feb. 1, 2015) New augmented reality smart glasses developed by researchers at Oxford University can help people with visual impairments improve their vision by providing depth-based feedback, allowing users to "see" better. Joel Flynn reports. Video provided by Reuters
Powered by NewsLook.com
Flu Season Hitting Elderly Hard

Flu Season Hitting Elderly Hard

Reuters - US Online Video (Jan. 31, 2015) The CDC says this year&apos;s flu season is hitting people 65 years of age and older especially hard. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
CDC: Get Vaccinated for Measles

CDC: Get Vaccinated for Measles

Reuters - US Online Video (Jan. 30, 2015) The CDC is urging people to get vaccinated for measles amid an outbreak that began at Disneyland and has now infected more than 90 people. Linda So reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins