Acid levels in the diet could have profound effects on kidney health

November 9, 2013

Three new studies suggest that controlling dietary acid intake could help improve kidney health. Results of these studies will be presented at ASN Kidney Week 2013 November 5-10 at the Georgia World Congress Center in Atlanta, GA.

A diet rich in and produces an in the body that worsens with age as kidney function declines. This acid load can be detrimental to a variety of tissues and processes. Research suggests that consuming more fruits and vegetables—which are highly alkaline—may help counteract these effects.

In a new study, a team led by Nimrit Goraya, MD (Texas A&M College of Medicine) investigated whether consuming fruits and vegetables can protect the kidney health of individuals with hypertensive nephropathy, a condition in which damage to the kidneys occurs due to high blood pressure. In this study, 23 hypertensive received extra dietary fruits and vegetables, 23 patients received an oral alkaline medication, and 25 patients received nothing. One year later, kidney injury progressed in patients who received no intervention, but kidney health was preserved in those receiving or oral alkaline medication.

In another study, Eiichiro Kanda, MD, PhD (Tokyo Kyosai Hospital) and his colleagues investigated the role of dietary in chronic kidney disease (CKD) progression. The retrospective study analyzed data from 249 CKD patients in Japan. High acid levels were linked with accelerated kidney function decline, and patients with elevated acid levels had an increased risk of CKD progression compared with patients with low acid levels. The findings suggest that monitoring and control of dietary acid levels are necessary for the prevention of CKD progression.

Another study led by Deidra Crews, MD, FASN (Johns Hopkins University School of Medicine) looked to see whether the effect of dietary acid on risk of kidney failure differed by race in a group of 159 non-Hispanic black and 760 non-Hispanic white CKD patients who had an annual household income below 300% of the federal poverty guideline. Participants were taking part in the 1999-2004 National Health and Nutrition Examination Survey. Overall, 12.4% of participants (38.3% whites and 61.7% blacks) developed kidney failure during an average of 6.4 years of follow up. Blacks had higher acid levels than whites. They also had a 3-fold higher risk of developing kidney failure compared with whites after adjusting for factors such as age, sex, and caloric intake. Increased acid levels were more strongly associated with failure among blacks than among whites. The findings indicate that among CKD patients with low socioeconomic status, the detrimental effect of high dietary acid levels on progression to appears to be greater for blacks than for whites.

Explore further: Consuming more vegetable protein may help kidney disease patients live longer

More information: "Fruits and Vegetables or Oral NaHCO3 Prevent Progression of Kidney Injury in Stage 1 CKD Due to Hypertensive Nephropathy." (Abstract FR-PO816)

"Dietary Acid Load Is Associated with Chronic Kidney Disease Progression in Elderly Patients." (Abstract TH-PO243)

"Race, Dietary Acid Load and Risk of ESRD among Low Income Americans with CKD." (Abstract SA-OR050)

Related Stories

Consuming more vegetable protein may help kidney disease patients live longer

November 7, 2013
Increased consumption of vegetable protein was linked with prolonged survival among kidney disease patients in a new a study. The findings will be presented at ASN Kidney Week 2013 November 5-10 at the Georgia World Congress ...

Health of kidney disease patients: Diet and blood pressure

November 1, 2012
Three studies presented during the American Society of Nephrology's Annual Kidney Week provide new information on diet and blood pressure in kidney disease patients.

Fruits and vegetables may help protect the kidneys

February 7, 2013
Adding fruits and vegetables to the diet may help protect the kidneys of patients with chronic kidney disease (CKD) with too much acid build-up, according to a study appearing in an upcoming issue of the Clinical Journal ...

Vitamin D supplements may improve kidney transplant recipients' health

November 8, 2013
Adequate vitamin D levels are important for maintaining kidney transplant recipients' health, according to a study that will be presented at ASN Kidney Week 2013 November 5-10 at the Georgia World Congress Center in Atlanta, ...

Lowering salt intake improves heart and kidney health of chronic kidney disease patients

November 7, 2013
Reducing salt intake provides clear benefits for the heart and kidney health of patients with chronic kidney disease, according to a study appearing in an upcoming issue of the Journal of the American Society of Nephrology ...

Healthy diet, moderate alcohol linked with decreased risk of kidney disease in patient with diabetes

August 12, 2013
Eating a healthy diet and drinking a moderate amount of alcohol may be associated with decreased risk or progression of chronic kidney disease (CKD) in patients with type 2 diabetes mellitus, according to a report published ...

Recommended for you

Brain disease seen in most football players in large report

July 25, 2017
Research on 202 former football players found evidence of a brain disease linked to repeated head blows in nearly all of them, from athletes in the National Football League, college and even high school.

Safety of medical devices not often evaluated by sex, age, or race

July 25, 2017
Researchers at Yale and the University of California-San Francisco have found that few medical devices are analyzed to consider the influence of their users' sex, age, or race on safety and effectiveness.

Why you should consider more than looks when choosing a fitness tracker

July 25, 2017
A UNSW study of five popular physical activity monitors, including Fitbit and Jawbone models, has found their accuracy differs with the speed of activity, and where they are worn.

Dog walking could be key to ensuring activity in later life

July 24, 2017
A new study has shown that regularly walking a dog boosts levels of physical activity in older people, especially during the winter.

Alcohol to claim 63,000 lives over next five years, experts warn

July 24, 2017
Alcohol consumption will cause 63,000 deaths in England over the next five years – the equivalent of 35 deaths a day – according to a new report from the University of Sheffield Alcohol Research Group.

Alcohol boosts recall of earlier learning

July 24, 2017
Drinking alcohol improves memory for information learned before the drinking episode began, new research suggests.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.