Can extra salt hurt your kidneys?

Translate to Spanish or other 102 languages!

Your kidneys balance the amount of sodium in your body. If you're getting too much, it builds up in your blood. Your heart works harder to pump and increases blood pressure, raising the risk of heart disease, stroke and kidney disease. Image for illustration purposes
Your kidneys balance the amount of sodium in your body. If you’re getting too much, it builds up in your blood. Your heart works harder to pump and increases blood pressure, raising the risk of heart disease, stroke and kidney disease. Image for illustration purposes
- Advertisement -

By Jason Howland / Mayo Clinic News Network

Sodium is a mineral that your body needs to function well. When you combine sodium with the mineral, chloride, the two make table salt. Sodium is added to many processed foods, including packaged and frozen meals. Many recipes call for salt in the ingredients, and many people add table salt to their food for flavor.

March is National Kidney Month, observed annually to raise awareness about kidney disease and promote kidney health. According to Dr. Ivan Porter II, a Mayo Clinic nephrologist, adding too much salt to your diet is not a good thing, and it can increase your risk of chronic kidney disease.

- Advertisement -

Watch The Mayo Clinic Minute Video Below

Video courtesy of Mayo Clinic News Network

Your kidneys balance the amount of sodium in your body. If you’re getting too much, it builds up in your blood. Your heart works harder to pump and increases blood pressure, raising the risk of heart diseasestroke and kidney disease.

“Chronic kidney disease — that’s the way that we describe what occurs when the kidney has issues with filtering wastes and toxins from the blood,” says Dr. Porter.

Sodium is added to most processed foods. It’s also in a lot of condiments. “So it’s very easy for us to get way more sodium than we need. And it’s very easy for us to get a dangerous amount of sodium that has some impact on our blood pressure or our overall health,” he says.

- Advertisement -

The recommended daily limit of sodium is 2,300 milligrams, or about 1 teaspoon. Dr. Porter recommends reading food labels. And cut back on the saltshaker by using salt-free seasonings.

“Sometimes you can either stop or reverse some of the initial damage that happens with chronic kidney disease. The longer that the process goes on, the more severe it is, the less likely it is to be able to get back to healthy kidneys. And that’s when we have to think about things to replace kidney function like dialysis or transplant,” he says.

Additional resources:

- Advertisement -
- Advertisement -

- Advertisement -

More Articles

Mayo Clinic Q&A: Heartburn or heart attack? How to tell the difference

Many people worry that heartburn-like symptoms could be a heart attack — and that concern is understandable.

AI-Powered Blood Test Successfully Detects Liver Cancer

Researchers at the Johns Hopkins Kimmel Cancer Center validated an artificial intelligence (AI)-powered blood test that accurately detected liver cancer in people from two geographically and biologically distinct populations and also uncovered the underlying biological signals that make the test effective.

Updated Level IV Trauma Center Standards Announced by ACS

The American College of Surgeons Committee on Trauma (ACS COT) has released new standards for Level IV trauma centers. The new resource, Resources for Optimal Care of the Injured Patient: Level IV Trauma Center Standards (2026), can help Level IV trauma centers assess capabilities, identify improvement opportunities, and strengthen trauma care delivery. 

Is Your Daily Coffee Bad for Your Heart?

Love coffee? You’re hardly alone. But what is the caffeine in your mug doing to your heart health?
- Advertisement -