Gout Blood Test: Monitoring Uric Acid Levels

Gout is the most common form of inflammatory arthritis in the United Kingdom, affecting roughly 1 in 40 adults — that is approximately 1.5 million people. Despite being one of the oldest recorded medical conditions, gout remains widely misunderstood and frequently undertreated. The good news is that blood tests play a central role in diagnosing, monitoring, and managing gout effectively.

What Causes Gout?

Gout develops when uric acid accumulates in the blood (a state called hyperuricaemia) and forms monosodium urate crystals in joints and surrounding tissues. These needle-shaped crystals trigger intense inflammatory reactions, producing the sudden, severe joint pain that characterises a gout flare. The metatarsophalangeal joint of the big toe is the classic site, though gout can affect the ankles, knees, wrists, fingers, and elbows.

Uric acid is the end product of purine metabolism. Purines come from two sources: your own cells (as they break down and regenerate) and the food you eat. Red meat, organ meats, shellfish, and alcohol — particularly beer and spirits — are well-documented dietary triggers. However, diet accounts for only about 12% of the variation in serum urate levels. The majority of hyperuricaemia is driven by how efficiently your kidneys excrete uric acid, which is largely determined by genetics.

The Uric Acid Blood Test: Diagnostic Thresholds

Serum uric acid is the single most important blood test for gout management. The British Society for Rheumatology (BSR) recommends the following thresholds:

• Women: Levels above 360 µmol/L (6 mg/dL) are considered elevated
• Men: Levels above 420 µmol/L (7 mg/dL) are considered elevated
• Treatment target: Below 300 µmol/L (5 mg/dL) for patients with recurrent flares or tophi, and below 360 µmol/L for all gout patients on urate-lowering therapy

Timing matters significantly. During an acute flare, uric acid levels can paradoxically drop — sometimes into the normal range — because the inflammatory response increases renal excretion of urate. For this reason, the BSR recommends measuring uric acid during an attack-free period, ideally at least two weeks after a flare has resolved, to get an accurate baseline reading.

Why a Single Uric Acid Test Is Not Enough

Gout rarely exists in isolation. Research consistently shows that hyperuricaemia is strongly associated with metabolic syndrome, and people with gout have significantly higher rates of cardiovascular disease, type 2 diabetes, chronic kidney disease, and fatty liver disease. A comprehensive blood panel gives you a much clearer picture of your overall health risk profile.

Kidney Function (eGFR, Creatinine, Urea)

Approximately 70% of uric acid is excreted through the kidneys. When kidney function declines, uric acid clearance drops, creating a vicious cycle: hyperuricaemia contributes to kidney damage, and kidney damage worsens hyperuricaemia. Chronic gout has been linked to a two- to three-fold increase in chronic kidney disease risk. Monitoring your estimated glomerular filtration rate (eGFR) and creatinine levels is essential — particularly if you are taking urate-lowering therapy such as allopurinol, which requires dose adjustment based on kidney function.

Inflammatory Markers (CRP and ESR)

C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) rise sharply during gout flares. CRP can reach 100 mg/L or higher in severe attacks. These markers serve two purposes: confirming an inflammatory process during a suspected flare and tracking whether chronic low-grade inflammation persists between attacks. Persistently elevated CRP in a gout patient may indicate ongoing crystal deposition even in the absence of obvious symptoms — a state sometimes called intercritical gout.

Lipid Panel (Total Cholesterol, LDL, HDL, Triglycerides)

Dyslipidaemia is extraordinarily common in gout patients. Studies from the UK Biobank show that people with gout have a 40-60% higher prevalence of raised triglycerides compared to the general population. High triglycerides are independently associated with hyperuricaemia, and the combination significantly increases cardiovascular risk. A full lipid panel helps quantify this risk and guides treatment decisions.

HbA1c (Glycated Haemoglobin)

The relationship between gout and type 2 diabetes is bidirectional. Insulin resistance reduces renal uric acid excretion, promoting hyperuricaemia. Conversely, elevated uric acid impairs insulin signalling. A 2020 meta-analysis found that people with gout have a 77% higher risk of developing type 2 diabetes. Checking HbA1c — which reflects average blood glucose over the preceding 8-12 weeks — provides early warning of prediabetes (42-47 mmol/mol) or diabetes (48 mmol/mol or above) in this high-risk group.

Liver Function (ALT, AST, GGT, ALP)

Non-alcoholic fatty liver disease (NAFLD) affects up to 50% of gout patients, compared with approximately 25% of the general population. Liver enzymes — particularly ALT and GGT — can flag hepatic steatosis or damage. Liver function testing is also important because allopurinol, the most widely prescribed urate-lowering drug in the UK, can occasionally cause hepatotoxicity. Baseline and periodic liver function tests are recommended for patients on long-term therapy.

Full Blood Count (FBC)

A full blood count provides useful baseline data. White blood cell counts rise during acute flares (neutrophilia is typical). Haemoglobin and red cell indices help rule out concurrent conditions, and platelet counts may be relevant given the cardiovascular risk profile of most gout patients.

Who Should Get Tested?

Consider comprehensive blood testing if you:

• Have had one or more episodes of acute joint pain and swelling, particularly in the big toe
• Have a family history of gout
• Take diuretics (thiazides and loop diuretics both raise uric acid levels)
• Have existing cardiovascular disease, kidney disease, or metabolic syndrome
• Are already on urate-lowering therapy and need to check that your levels are at target

How to Test With Lola Health

Our Core Health 45 blood test (£120) covers kidney function, liver function, lipid panel, HbA1c, CRP, and a full blood count — providing a thorough metabolic and inflammatory profile alongside your uric acid measurement. Uric acid is available as an add-on biomarker when you order your test, making it straightforward to build a complete gout monitoring panel from a single blood draw.

All samples are analysed in UKAS-accredited laboratories, and your results are reviewed by qualified clinicians before being released to you through your online dashboard. If your results flag any concerns, our medical team will provide written commentary to guide your next steps — whether that means discussing findings with your GP, adjusting lifestyle factors, or scheduling a follow-up test.

Lifestyle Measures That Lower Uric Acid

Whilst medication is the cornerstone of treatment for recurrent gout, lifestyle changes can make a meaningful contribution to reducing uric acid levels:

• Hydration: Aim for at least 2 litres of water daily to support renal uric acid excretion
• Reduce alcohol: Beer is the highest-risk alcoholic drink for gout; moderate wine consumption appears less problematic
• Limit high-purine foods: Organ meats, game, shellfish, and sardines
• Cherries: A 2012 study in Arthritis & Rheumatism found that cherry consumption was associated with a 35% lower risk of gout attacks
• Maintain a healthy weight: Obesity is one of the strongest modifiable risk factors for hyperuricaemia
• Vitamin C: Supplementation of 500 mg/day has been shown to modestly reduce uric acid levels in some studies

Monitoring Frequency

If you have been diagnosed with gout and are on urate-lowering therapy, the BSR recommends checking uric acid levels every 2-4 weeks during dose titration, then every 6-12 months once you have reached your target level. Kidney and liver function should be checked at least annually. If you are not on medication but have elevated uric acid, retesting every 3-6 months alongside a comprehensive metabolic panel allows you to track trends and intervene early if levels are climbing.

Gout is one of the few forms of arthritis that can be effectively controlled when monitored properly. Regular blood testing transforms gout management from reactive — waiting for the next agonising flare — to proactive, keeping uric acid consistently below the crystallisation threshold and protecting your kidneys, heart, and metabolic health in the process.