Uric Acid (Blood Test)
Uric acid is the end product of purine breakdown — its blood test helps assess the risk of gout and kidney stones, but a single result on its own neither confirms nor rules out disease.
Number of studies
1
Safety
Requires caution
Time to effects
Not applicable — the uric acid test is a diagnostic test, not an intervention.
Who it's for
Table of contents
TL;DR
Uric acid is the end product of purine breakdown — its blood test helps assess the risk of gout and kidney stones, but a single result on its own neither confirms nor rules out disease.
- →Helps assess the risk of gout and monitor the effectiveness of urate-lowering treatment
- →Supports the workup of uric acid kidney stones together with imaging tests
- →Is one of the parameters considered when assessing metabolic syndrome and cardiovascular risk
| Test type | Serum uric acid concentration |
|---|---|
| Level of evidence | Strong — a well-standardized biochemical test with known reference ranges |
| Target group | People with joint pain suggestive of gout, kidney stones, or features of metabolic syndrome |
| Key parameters | Serum uric acid concentration (mg/dL or μmol/L), with separate reference ranges for women and men |
| Preparation | Usually doesn't require fasting, though the lab may combine it with other tests that do require such preparation |
| Status | A standard diagnostic and monitoring test |
Understand
Overview
Uric acid is the end product of purine breakdown — compounds that come both from the diet (red meat, seafood, alcohol) and from the body's own natural cell turnover. The test measures its concentration in blood serum and is most often ordered when gout is suspected, in the workup of kidney stones, when assessing metabolic syndrome, and to monitor urate-lowering treatment. This article covers the test itself and how to interpret it — a detailed discussion of gout as a disease, its symptoms, and treatment is covered in a separate article.
According to current population data, uric acid reference ranges differ substantially between sexes, and the hyperuricemia threshold used today tends to be higher than previously assumed. It's worth remembering, though, that the blood uric acid level itself is not the same as a diagnosis of gout — during an acute gout flare, the concentration can remain within the normal range, and a markedly elevated level doesn't have to be accompanied by any clinical symptom at all.
Who can genuinely benefit from this? People with joint pain and swelling suggestive of gout, in the workup of uric acid kidney stones, when assessing metabolic syndrome, and to monitor treatment effectiveness in people already diagnosed with hyperuricemia or gout. Interpreting a single result without clinical context — symptoms, history of flares, kidney function — can be misleading in either direction.
Mechanism of action
Uric acid forms as the end product of purine catabolism, from both dietary purines and the breakdown of the body's own nucleic acids, in a reaction catalyzed by the enzyme xanthine oxidase. Humans, unlike most mammals, lack an active uricase enzyme that would further break down uric acid into the more soluble allantoin — as a result, uric acid levels in humans are physiologically higher and more sensitive to dietary and metabolic factors than in other animals.
About two-thirds of the uric acid produced is excreted by the kidneys, and the rest through the gastrointestinal tract. Renal excretion depends on a complex system of tubular transporters (including URAT1) responsible for urate reabsorption and secretion — this is why dehydration, certain diuretics, and low-dose aspirin increase reabsorption and raise uric acid levels, while uricosuric drugs (e.g., losartan) increase its excretion. When the concentration of uric acid exceeds its solubility threshold in blood and joint fluid, monosodium urate crystallizes, triggering the inflammatory cascade responsible for an acute gout flare.
Production of uric acid from purines
Xanthine oxidase converts purines from diet and cell turnover into uric acid; the lack of uricase in humans limits its further breakdown.
Renal excretion via transporters
Tubular transporters such as URAT1 regulate urate reabsorption and secretion, which are affected by medications and hydration status.
Crystallization above the solubility threshold
Excess uric acid crystallizes as monosodium urate, triggering the inflammation responsible for a gout flare.
Evidence: strong — based on 1 study in this database.
Benefits
Common myths
MythA normal uric acid result rules out gout.
FactDuring an acute gout flare, blood uric acid levels can be normal or even low, so a single result doesn't rule out the diagnosis — the clinical picture, and sometimes joint fluid analysis, is what matters most.
MythDiet alone determines uric acid levels.
FactGenetic factors, kidney function, body weight, and certain medications often have a greater effect on uric acid levels than diet alone.
Check your profile
Not sure which supplements actually make sense for you?
Answer a few short questions about your lifestyle, diet, sleep, and goals. VitMode will build your profile and show supplements worth considering — with reasoning and evidence strength.
Recommendations take your answers and the strength of the scientific evidence into account. A supplement's popularity has no bearing on whether it gets recommended.
Practice
Frequently asked questions
Reference ranges vary between labs and by sex, but hyperuricemia is often defined as a result of around 7 mg/dL or higher in men and somewhat lower in women — the exact clinical threshold is best referenced against the specific lab's range.
The test itself usually doesn't require fasting, though it's often combined with other tests (e.g., a lipid panel) that do — in that case, it's best to follow the preparation instructions for the whole panel.
No — an elevated level (hyperuricemia) is a risk factor, but in many people it never leads to a gout flare. Diagnosing gout relies primarily on the clinical picture, not solely on a blood test result.
What to combine with
Good combinations
Metabolic Syndrome — Elevated uric acid often coexists with other features of metabolic syndrome
Lipid Panel — Hyperuricemia tends to be linked with lipid abnormalities — it's worth interpreting both results together
Safety
Side effects & contraindications
Possible side effects
Contraindications
No significant contraindications at typical doses.
Interactions
Alcohol, especially beer, and a diet rich in red meat and seafood raise uric acid levels
Dehydration and intense, prolonged physical exertion can temporarily raise the result
Thiazide and loop diuretics and low-dose aspirin raise uric acid levels, while losartan and high-dose aspirin lower it
Rapid weight loss or fasting can paradoxically raise uric acid levels
Is it worth taking?
Who it's for
- People with joint pain, swelling, or redness suggestive of gout
- People with kidney stones, metabolic syndrome, or monitoring urate-lowering treatment
Not for
- No significant contraindications at typical doses.
Evidence
Worth knowing
Humans, unlike most mammals, lack an active uricase enzyme, so they cannot further break down uric acid, making it more sensitive to dietary and metabolic factors.
About two-thirds of uric acid is excreted by the kidneys, and the remaining third through the gastrointestinal tract.
Studies
Reference ranges for serum uric acid were 4.0 to 9.2 mg/dL for men and 2.8 to 6.9 mg/dL for women, and the prevalence of hyperuricemia reached 31.9% in men and 4.8% in women.
Dório M et al., Advances in Rheumatology, 2022
Reference range of serum uric acid and prevalence of hyperuricemia: a cross-sectional study from baseline data of ELSA-Brasil cohort
Strong evidenceDório M, Benseñor IM, Lotufo P, Santos IS, Fuller R · Advances in Rheumatology · 2022
A cross-sectional analysis of more than 15,000 participants of the ELSA-Brasil cohort, establishing current reference ranges for uric acid and the prevalence of hyperuricemia by sex.
View studySources & bibliography
The PubMed identifiers in this knowledge base were checked against NCBI records (October 2026). If you spot an error in a source, please let us know via the contact form.
Compare with similar entries
About the authors of this entry
Author
Redakcja VitMode — Żywienie, suplementy i treningEditorial team
VitMode Editorial — Nutrition, Supplements and Training is the VitMode editorial team responsible for: nutrition, supplements, interactions and training. The team has no individual bylines — texts are prepared by VitMode editors from primary sources (clinical trials, meta-analyses, guidelines). Every cited PubMed paper is automatically checked for a matching identifier, title and publication year. The content is educational and does not replace medical advice. Factual errors can be reported in a comment under the post or through the contact form; corrections are made by the editorial team.
210 publications on this site
Editorial review
Redakcja VitMode — Hormony i endokrynologiaEditorial team
VitMode Editorial — Hormones and Endocrinology is the VitMode editorial team responsible for: hormones, testosterone therapy, the thyroid and metabolism. The team has no individual bylines — texts are prepared by VitMode editors from primary sources (clinical trials, meta-analyses, guidelines). Every cited PubMed paper is automatically checked for a matching identifier, title and publication year. The content is educational and does not replace medical advice. Factual errors can be reported in a comment under the post or through the contact form; corrections are made by the editorial team.
328 publications on this site
Related entries
Metabolic Syndrome
A cluster of five risk factors — from abdominal obesity to elevated triglycerides — that multiplies the risk of type 2 diabetes and cardiovascular disease, but is largely modifiable through lifestyle change.
Lipid Panel
The lipid panel is one of the most important — and still one of the most frequently misread — preventive blood tests: 'total cholesterol' alone tells you less than the ratios between its fractions.
How to Read a Basic Blood Test Panel
CBC, lipid panel, glucose, TSH — how to read the results of a basic blood panel so you catch early signals of a problem before it becomes a disease.
HbA1c (Glycated Hemoglobin)
A biomarker reflecting average blood glucose over the past 2–3 months — the gold standard for diagnosing and monitoring diabetes, far more stable than a single glucose measurement.
Creatinine and eGFR (Estimated Glomerular Filtration Rate)
Creatinine alone tells you surprisingly little about kidney function — only converting it into eGFR using the CKD-EPI equation reveals how much filtration capacity actually remains.
Total Protein and Albumin Blood Test
Total protein and albumin are among the oldest, yet also most ambiguous, laboratory panels — the same low result can mean malnutrition, kidney disease, chronic inflammation, or simply blood dilution from IV fluids, and telling these scenarios apart takes more than a single number on a printout.
Liver Panel (ALT, AST, GGT, Bilirubin)
Four entries on a lab printout — ALT, AST, GGT, and bilirubin — can reveal liver damage before any symptoms appear, as long as you know how to tell a hepatocellular pattern apart from a cholestatic one.
TSH and Thyroid Hormones (fT3, fT4, anti-TPO)
TSH is the first-line test for evaluating thyroid function, but on its own it rarely gives the full picture — only together with fT4, fT3, and anti-TPO can it distinguish a temporary fluctuation from an actual disorder.
Related articles
PoradnikiGout: Causes and Treatment
Gout is the most common inflammatory joint disease in adult men — and a disease whose treatment still runs into the same mistakes: treating only the acute flare without addressing the underlying cause, doses of urate-lowering drugs that are too low or titrated too slowly, and stopping therapy prematurely once the pain resolves. We look at what the American College of Rheumatology guidelines and major clinical trials actually show about treating a flare and long-term therapy.
September 16, 2026
PoradnikiNormal Testosterone, But You Feel Awful — Could You Still Have Hypogonadism?
A testosterone result that comes back "in range" on a lab printout doesn't always mean everything is hormonally fine — but it doesn't automatically mean you have hypogonadism either. We explain four real explanations for this mismatch, ranked by strength of evidence.
August 15, 2026
PoradnikiTRT or Natural Testosterone Boosting? A Practical Decision Test Before You Pick a Path
Before weighing the merits of TRT against the merits of lifestyle change, work out which of four situations you're actually in — because that, not preference or opinions from the internet, is what should decide your path.
August 15, 2026
PoradnikiTRT and High Estradiol — Symptoms, Causes, and What You Can Do About It
Suspect you have high estradiol on TRT? Before you reach for a forum post and someone else's anastrozole protocol, check which symptoms actually point to it and what order to act in — from bloodwork, through talking to your doctor, to a possible medication.
August 15, 2026
PoradnikiThe Most Common TRT Mistakes — 15 Things That Can Undermine Your Therapy's Results
A wrap-up of our entire testosterone therapy series: fifteen common, real mistakes — from diagnostics to discontinuation — that can turn a well-designed TRT protocol into a source of disappointment or genuine health risk.
August 15, 2026