Uric acid is a natural waste product produced by the body when it breaks down substances called purines. Normally, uric acid dissolves in the blood, passes through the kidneys and leaves the body through urine. However, when the body produces too much uric acid or the kidneys cannot remove enough of it, the uric acid level can rise.
A high uric acid level is known as hyperuricemia. In some people, excess uric acid can form tiny needle-shaped crystals in and around the joints, leading to gout, a painful form of inflammatory arthritis. High uric acid can also be associated with kidney stones. However, not everyone with a high uric acid level develops gout or other symptoms.
In this article, we will explain what uric acid is, its causes, symptoms of high uric acid, normal uric acid levels, testing methods, treatment options, diet and lifestyle measures, and when you should consult a healthcare professional.
What Is Uric Acid?
Uric acid is produced when the body breaks down purines. Purines are naturally present in the body’s cells and are also found in certain foods and beverages.
Under normal circumstances, the kidneys filter uric acid from the blood and remove it through urine. Problems can occur when the body produces excessive uric acid or the kidneys do not eliminate enough of it. As a result, uric acid can accumulate in the blood.
When uric acid levels become high, some people may develop urate crystals. These crystals can collect in joints and trigger inflammation, resulting in a gout attack.
What Causes High Uric Acid?
High uric acid can occur for several reasons. The most common causes include increased production of uric acid or reduced removal by the kidneys.
1. Purine-Rich Foods
Some foods contain higher amounts of purines. When these substances are broken down, they produce uric acid.
Foods that may contribute to higher uric acid levels include:
- Organ meats such as liver and kidney
- Red meat
- Certain seafood
- Anchovies and sardines
- Shellfish
- Some alcoholic beverages
- Foods and drinks containing large amounts of fructose
However, diet is only one factor. Kidney function, medications, genetics, weight and other health conditions can also influence uric acid levels.
2. Reduced Kidney Function
The kidneys play an important role in removing uric acid from the body. If kidney function is reduced, uric acid may remain in the bloodstream for longer and its level may increase.
3. Obesity and Metabolic Problems
Being overweight or having certain metabolic conditions may increase the risk of elevated uric acid and gout.
4. Alcohol Consumption
Alcohol can contribute to increased uric acid levels and may trigger gout attacks in susceptible people.
5. Certain Medicines
Some medicines, including certain diuretics and other drugs, can affect uric acid levels. You should never stop a prescribed medicine without discussing it with your healthcare professional first.
6. Certain Medical Conditions
High uric acid may be associated with conditions such as kidney disease, obesity, some blood disorders and conditions that cause rapid breakdown of cells.
Symptoms of High Uric Acid
One important point is that high uric acid itself may not cause noticeable symptoms.
Many people have hyperuricemia without knowing it. Symptoms generally appear when uric acid contributes to problems such as gout or kidney stones.
Possible symptoms associated with gout include:
- Sudden and severe joint pain
- Joint swelling
- Redness around the affected joint
- Warmth over the joint
- Joint tenderness
- Difficulty moving the affected joint
Gout commonly affects the big toe, although the ankles, knees, toes and other joints can also be affected. Gout attacks may begin suddenly, sometimes at night and can cause intense pain.
What Does a Gout Attack Feel Like?
A gout attack can develop suddenly. The affected joint may become extremely painful, swollen, red and warm.
The big toe is a common site, but gout can also affect the ankle, knee and other joints.
Without appropriate management, recurrent gout attacks can become more frequent and may eventually contribute to joint damage and deposits called tophi.
Uric Acid Normal Range
The normal uric acid range can vary slightly depending on the laboratory, testing method, age, sex and other factors.
One commonly reported reference range for blood uric acid is:
| Group | Example Reference Range |
|---|---|
| Women | 3.0–7.1 mg/dL |
| Men | 4.0–8.6 mg/dL |
These ranges are examples and may differ between laboratories. Therefore, always compare your result with the reference range printed on your own laboratory report.
It is also important to understand that a uric acid result alone does not confirm gout. A person can have elevated uric acid without developing gout, while diagnosis of gout may require evaluation of symptoms and in some cases, testing of joint fluid for urate crystals.
What Uric Acid Level Is Considered High?
A uric acid level above the laboratory’s reference range may be considered elevated.
However, the interpretation depends on the individual and the reason for testing. For people being treated for gout, healthcare professionals often use a lower uric acid target to reduce crystal formation and prevent future attacks. A commonly used treatment target is below 6 mg/dL, although the appropriate target can depend on the patient’s clinical situation.
Therefore, do not interpret a uric acid report based on a single number without considering your symptoms, medical history, kidney function, medications and laboratory reference range.
How Is Uric Acid Tested?
A uric acid blood test is commonly used to measure the amount of uric acid in the blood.
A urine test may also be performed in certain situations, such as evaluating kidney stones or investigating how much uric acid the kidneys are eliminating.
If gout is suspected, a healthcare professional may use additional tests. Joint fluid can be examined under a microscope to look for urate crystals. Imaging such as ultrasound or specialized CT scanning may also be used in selected cases.
Treatment for High Uric Acid and Gout
Treatment depends on the cause, uric acid level, symptoms, medical history, kidney function and whether the person has gout or complications.
1. Lifestyle Changes
Healthy lifestyle habits can support uric acid management and reduce the risk of gout attacks.
Helpful measures may include:
- Maintaining a healthy body weight
- Regular physical activity
- Limiting alcohol
- Reducing sugary drinks and foods high in fructose
- Limiting excessive intake of red meat and organ meats
- Choosing a balanced diet
- Staying adequately hydrated unless fluid restriction has been advised for another medical condition
Dietary changes can be helpful, but people with recurrent gout may also require medication.
2. Medicines for an Acute Gout Attack
When a person has an acute gout attack, healthcare professionals may use medicines to reduce pain and inflammation. Depending on the individual, these can include NSAIDs, colchicine or corticosteroids.
The appropriate medicine and dose should be decided by a healthcare professional because some medicines may not be suitable for people with kidney disease, stomach problems, cardiovascular conditions or other medical issues.
3. Medicines to Lower Uric Acid
People with recurrent or complicated gout may require long-term uric-acid-lowering treatment.
Medicines such as allopurinol or febuxostat may be prescribed in appropriate cases. Other medicines may be considered depending on the patient’s condition.
The purpose of long-term treatment is not simply to make a laboratory number look normal. It is to reduce urate crystal formation, prevent gout attacks and reduce complications such as tophi and kidney stones.
Foods to Limit When Uric Acid Is High
If your uric acid is elevated or you have gout, discuss your diet with a healthcare professional or qualified dietitian.
Foods and beverages that may need to be limited include:
- Organ meats
- Large amounts of red meat
- Certain seafood
- Anchovies
- Sardines
- Shellfish
- Alcohol
- Sugary drinks
- Foods containing large amounts of fructose
A healthy diet should not be unnecessarily restrictive. Many nutritious foods, including vegetables, whole grains, nuts, legumes and appropriate dairy products, can form part of a balanced eating pattern.
Can High Uric Acid Be Prevented?
Not every case of high uric acid can be prevented because genetics, kidney function, medications and medical conditions can play a role.
However, several healthy habits may help:
- Maintain a healthy body weight.
- Exercise regularly.
- Drink adequate fluids when medically appropriate.
- Limit alcohol.
- Avoid excessive consumption of sugary beverages.
- Limit excessive intake of purine-rich foods.
- Follow your prescribed treatment plan.
- Monitor uric acid when recommended by your healthcare professional.
These steps may help reduce the risk of gout attacks and other complications.
When Should You See a Doctor?
You should seek medical evaluation if you experience:
- Sudden severe joint pain
- A swollen, red, or hot joint
- Repeated episodes of unexplained joint pain
- Symptoms suggesting kidney stones
- Persistently elevated uric acid on blood tests
- A history of gout
- Painful lumps around joints that may represent tophi
Sudden joint pain and swelling can have causes other than gout, so proper diagnosis is important.
Frequently Asked Questions About Uric Acid
1. What is uric acid?
Uric acid is a waste product produced when the body breaks down purines. Normally, the kidneys filter it from the blood and remove it through urine.
2. What causes high uric acid?
High uric acid can occur when the body produces too much uric acid or the kidneys cannot remove enough. Diet, alcohol, obesity, kidney problems, certain medicines, genetics and some medical conditions can contribute.
3. What is the normal uric acid level?
Reference ranges vary between laboratories. One commonly reported range is approximately 3.0–7.1 mg/dL for women and 4.0–8.6 mg/dL for men. Always use the reference range provided by your laboratory.
4. Does high uric acid always mean gout?
No. Many people can have high uric acid without developing gout. Gout occurs when urate crystals cause inflammation in the joints.
5. Can uric acid be reduced naturally?
Healthy weight management, regular physical activity, limiting alcohol and sugary drinks and moderating high-purine foods may help. However, people with recurrent or complicated gout may need prescribed uric-acid-lowering medication.
Conclusion
Uric acid is a normal waste product, but excessive accumulation can become a health concern. High uric acid, also called hyperuricemia, does not always cause symptoms. However, in some people it can contribute to gout and kidney stones.
Understanding your uric acid level, diet, kidney function, medications and overall health is important for proper management. If you have persistent high uric acid or symptoms of gout, consult a qualified healthcare professional for an accurate diagnosis and personalized treatment plan.
Medical Disclaimer: This article is provided for general health education and informational purposes only. It is not a substitute for professional medical diagnosis, treatment, or advice. Do not start, stop or change any medicine without consulting a qualified healthcare professional.
Dr. Parminder Singh BEMS
