Metabolic acidosis
What is Metabolic acidosis?
Metabolic acidosis happens when your blood becomes too acidic. Your body works hard to keep your blood at a healthy pH level, which is a measure of how acidic or alkaline your blood is. When acid builds up or your body loses too much bicarbonate, a substance that helps neutralize acid, the pH drops too low.
This condition can develop quickly or slowly over time. It often signals an underlying health problem that needs attention. Your kidneys and lungs normally work together to keep your blood pH balanced. When this system breaks down, metabolic acidosis can occur.
The condition ranges from mild to severe. Mild cases may not cause noticeable symptoms. Severe cases can be life-threatening and require immediate medical care. Early detection through blood testing helps catch problems before they become serious.
Symptoms
- Rapid, deep breathing or shortness of breath
- Confusion or difficulty concentrating
- Fatigue and weakness
- Nausea and vomiting
- Loss of appetite
- Rapid heartbeat
- Headaches
- Muscle weakness or cramps
- Drowsiness or lethargy
Some people with mild metabolic acidosis have no symptoms at all. The condition may only be detected through routine blood testing. Symptoms tend to become more noticeable as the condition worsens.
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Causes and risk factors
Metabolic acidosis develops when your body produces too much acid or cannot remove acid effectively. Kidney disease is a common cause because damaged kidneys cannot filter acid from the blood properly. Uncontrolled diabetes can lead to diabetic ketoacidosis, where the body breaks down fat for energy and produces acidic ketones. Severe diarrhea causes loss of bicarbonate, which helps neutralize acid. Lactic acidosis occurs when lactic acid builds up, often during intense exercise, shock, or when tissues do not get enough oxygen.
Risk factors include chronic kidney disease, type 1 or type 2 diabetes, severe infections or sepsis, excessive alcohol use, certain medications, and prolonged starvation or very low-carb diets. Liver disease and heart failure also increase risk. Some people inherit conditions that affect how their body processes acid. Dehydration can worsen the condition by concentrating acid in the blood.
How it's diagnosed
Doctors diagnose metabolic acidosis through blood tests that measure your blood pH and electrolyte levels. A carbon dioxide test, also called a bicarbonate test, measures the amount of CO2 in your blood. Low levels can indicate metabolic acidosis. An arterial blood gas test provides the most detailed information about your blood's acid-base balance. These tests show whether your blood is too acidic and help identify the underlying cause.
Rite Aid offers carbon dioxide testing as an add-on to our preventive health panel. This test helps detect early signs of acid-base imbalances before symptoms appear. Your doctor may order additional tests to find the root cause, such as kidney function tests, blood sugar tests, or lactate levels. Early detection allows you to address the underlying problem and prevent complications.
Treatment options
- Treating the underlying cause, such as managing diabetes or kidney disease
- Intravenous fluids to help restore electrolyte balance
- Sodium bicarbonate therapy in severe cases to neutralize excess acid
- Adjusting medications that may contribute to the problem
- Eating a balanced diet rich in fruits and vegetables to support healthy pH levels
- Staying well hydrated with water throughout the day
- Managing chronic conditions like diabetes and kidney disease carefully
- Working with a dietitian to plan meals that support metabolic health
- Regular monitoring through blood tests to track your acid-base balance
- Dialysis for people with severe kidney disease
Need testing for Metabolic acidosis? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Metabolic acidosis happens when your body produces too much acid or your kidneys cannot remove it properly. Respiratory acidosis occurs when your lungs cannot remove enough carbon dioxide, which makes your blood acidic. The treatments differ because the root causes are different. Blood tests can help determine which type you have.
The outlook depends on the underlying cause. Acute metabolic acidosis from diarrhea or infection often resolves once the cause is treated. Chronic metabolic acidosis from kidney disease requires ongoing management. Early detection and proper treatment can prevent serious complications. Working with your healthcare team helps you manage the condition long-term.
Development speed varies by cause. Diabetic ketoacidosis can develop within hours. Kidney disease may cause metabolic acidosis that develops slowly over months or years. Severe diarrhea can trigger the condition within a day. Regular blood testing helps catch slow-developing cases before they cause symptoms.
Focus on fruits and vegetables, which help neutralize acid in your body. Leafy greens, berries, and citrus fruits are especially helpful despite tasting acidic. Limit processed foods, excess animal protein, and refined sugars. Stay hydrated with water throughout the day. Work with a dietitian for personalized advice based on your specific situation.
Severe metabolic acidosis can be life-threatening without treatment. It can affect your heart rhythm, weaken your bones, and impair kidney function. Mild cases are less dangerous but still need attention to prevent worsening. Early detection through blood testing allows for treatment before serious complications develop.
Testing frequency depends on your risk factors. People with diabetes or kidney disease should have regular blood tests every 3 to 6 months. Those with a history of metabolic acidosis may need more frequent monitoring. Healthy adults can check their carbon dioxide levels during annual preventive screenings. Your doctor will recommend a testing schedule based on your individual needs.
Intense exercise can cause temporary lactic acidosis, a type of metabolic acidosis. This happens when your muscles produce lactic acid faster than your body can clear it. The condition usually resolves quickly after you rest. Chronic metabolic acidosis from exercise alone is rare in healthy people. Proper hydration and gradual training intensity help prevent exercise-related acid buildup.
Several medications can trigger metabolic acidosis in some people. These include certain diuretics, metformin for diabetes, and some antibiotics. Aspirin overdose can also cause the condition. Always tell your doctor about all medications and supplements you take. Never stop prescribed medications without talking to your healthcare provider first.
Healthy kidneys filter acid from your blood and make bicarbonate to neutralize acid. When kidneys are damaged, they cannot perform these functions properly. Acid builds up in the blood while bicarbonate levels drop. This creates metabolic acidosis. The condition often worsens as kidney disease progresses, making regular monitoring important.
Yes, children can develop metabolic acidosis. Common causes in children include severe diarrhea, diabetes, kidney problems, and inherited metabolic disorders. Infants are particularly vulnerable because their kidneys are still developing. Symptoms in children may include rapid breathing, irritability, and poor feeding. Prompt medical attention is essential for children showing these signs.