Calcium and Uric Acid Test in Delhi

Calcium + Uric Acid Test at Home (Serum Calcium and Serum Uric Acid)

The Calcium + Uric Acid combination panel measures two chemically distinct but clinically related metabolic markers. Serum calcium reflects the balance between dietary absorption, skeletal storage, and renal excretion of calcium. Serum uric acid reflects the rate at which purines from the diet and from normal cell turnover are metabolised and cleared by the kidneys.

What makes this combination clinically meaningful is the convergence of both markers in two important disease processes: kidney stone formation and the metabolic syndrome cluster. Elevated uric acid and elevated calcium both contribute independently to nephrolithiasis, and identifying the relative role of each helps characterise the stone type and guides preventive management. Beyond kidney stones, the panel screens for gout, parathyroid disorders, and the cardiovascular and renal risk associated with chronic hyperuricaemia.

MAX@Home brings this panel to your doorstep through a single fasting blood draw by a certified phlebotomist. Your results are processed at a partner NABL-accredited laboratory, and a digital authenticated report is delivered within 24 to 48 hours.

What Serum Calcium Measures

Calcium is the most abundant mineral in the human body, with approximately 99 percent stored in bone and teeth. The remaining one percent circulates in the blood and extracellular fluid, maintained within a narrow physiological range – typically 8.5 to 10.5 mg/dL – through the coordinated actions of parathyroid hormone (PTH), calcitriol (active vitamin D), and calcitonin acting on bone, kidneys, and intestine.

Total serum calcium exists in three fractions: albumin-bound calcium (approximately 40 percent), calcium complexed with anions such as citrate and phosphate (approximately 10 percent), and free ionised calcium (approximately 50 percent), which is the biologically active form. Because calcium binds to albumin, total serum calcium can appear falsely low in patients with hypoalbuminaemia, and a corrected calcium calculation is applied to account for this.

Causes of elevated calcium - hypercalcaemia

• Primary hyperparathyroidism: the most common cause in outpatients, where autonomous PTH excess mobilises calcium from bone and reduces renal calcium excretion. Often discovered incidentally on routine biochemistry.
• Malignancy: cancer causes hypercalcaemia through direct bone metastases, secretion of PTH-related protein (PTHrP), or calcitriol production by lymphomas.
• Vitamin D toxicity from excessive supplementation, increasing calcium absorption beyond physiological regulation.
• Granulomatous diseases such as sarcoidosis or tuberculosis, where activated macrophages produce calcitriol independently.
• Prolonged immobilisation in patients with high bone turnover, such as those with Paget disease.
• Thiazide diuretics, which reduce renal calcium excretion and can cause mild persistent hypercalcaemia.

Causes of low calcium - hypocalcaemia

• Hypoparathyroidism, most commonly after thyroid or parathyroid surgery, or as an autoimmune condition.
• Vitamin D deficiency, which reduces intestinal calcium absorption.
• Chronic kidney disease, where impaired vitamin D activation and phosphate retention both lower calcium.
• Malabsorption syndromes such as coeliac disease or Crohn disease.
• Acute pancreatitis, where calcium is sequestered in areas of peripancreatic fat necrosis.

What Serum Uric Acid Measures

Uric acid is the final breakdown product of purine metabolism in humans. Purines occur in all body cells and in foods – particularly red meat, organ meats, shellfish, beer, and fructose-sweetened beverages. After purines are metabolised, xanthine oxidase converts xanthine to uric acid, which is excreted predominantly by the kidneys (approximately 70 percent) with the remainder cleared through the gut.

Serum uric acid levels reflect the balance between production and excretion. Most hyperuricaemia results from reduced renal excretion rather than overproduction. Normal ranges are generally below 7.0 mg/dL in adult males and below 6.0 mg/dL in adult females, though lower targets are recommended in patients with gout or uric acid nephrolithiasis.

Clinical significance of hyperuricaemia

• Gout: chronic serum uric acid above the saturation threshold of approximately 6.8 mg/dL causes monosodium urate crystal deposition in joints and soft tissues, triggering intense inflammatory attacks. The first metatarsophalangeal joint is the most classic site.
• Uric acid kidney stones: uric acid is insoluble in acidic urine. Patients with persistently low urine pH and hyperuricaemia are prone to forming uric acid stones, which are radiolucent on plain x-ray.
• Cardiovascular risk: hyperuricaemia is associated with hypertension, insulin resistance, and adverse cardiovascular outcomes, though causality versus marker status is debated.
• Chronic kidney disease: impaired renal function reduces uric acid clearance, and urate crystal deposition in renal tubules can in turn contribute to further kidney injury.
• Tumour lysis syndrome: patients receiving chemotherapy for haematological malignancies can develop acute severe hyperuricaemia from purine release by destroyed tumour cells.

Asymptomatic hyperuricaemia - the silent majority

Most people with elevated serum uric acid remain entirely asymptomatic and never develop gout or kidney stones. Asymptomatic hyperuricaemia has become increasingly common with rising obesity, metabolic syndrome, and dietary purine loads. Current guidelines generally recommend lifestyle modification as first-line management – dietary change, weight reduction, alcohol reduction – reserving pharmacological treatment for recurrent gout attacks, uric acid nephrolithiasis, or very high uric acid in the setting of organ impairment.

Why Test Calcium and Uric Acid Together

The Calcium + Uric Acid panel has particular clinical utility in the following overlapping scenarios:

• Kidney stone workup: calcium-containing stones (calcium oxalate and calcium phosphate) account for around 80 percent of all kidney stones; uric acid stones account for 10 to 15 percent. Knowing whether a patient has hypercalcaemia, hyperuricaemia, or both guides the preventive strategy for stone recurrence.
• Gout with suspected metabolic comorbidities: gout patients have a high prevalence of concurrent hypertension, type 2 diabetes, dyslipidaemia, and renal impairment. Hypercalcaemia in a gout patient may indicate co-existing hyperparathyroidism requiring separate investigation.
• Metabolic syndrome screening: both elevated uric acid and elevated calcium signal downstream metabolic risk. A single-draw combination panel is more efficient than two separate tests.
• Long-term thiazide diuretic use: thiazides simultaneously raise serum calcium (by reducing renal calcium excretion) and raise serum uric acid (by reducing renal urate excretion). Patients on chronic thiazides benefit from periodic monitoring of both markers together.

The kidney stone connection in detail

When a patient presents with renal colic or a confirmed kidney stone, identifying its metabolic driver is essential for prevention. Hypercalcaemia on the serum panel points toward calcium stone risk and usually warrants measurement of urine calcium, PTH, and vitamin D for full metabolic stone profiling. Hyperuricaemia points toward uric acid stone risk and is managed with urate-lowering therapy and urine alkalinisation. Elevation of both markers suggests a mixed-type risk profile requiring a comprehensive 24-hour urine collection and a detailed metabolic workup.

Conditions This Panel Evaluates

Gout and Chronic Hyperuricaemia

Gout is one of the most common inflammatory arthropathies in adults and the most common form of inflammatory joint disease in men. It typically presents as sudden, severe pain, swelling, warmth, and redness in a single joint – most classically the first metatarsophalangeal joint. The Calcium + Uric Acid panel is appropriate at diagnosis to confirm hyperuricaemia, during treatment to monitor the urate-lowering response, and at follow-up to detect coexisting metabolic abnormalities including hypercalcaemia.

Primary Hyperparathyroidism

Primary hyperparathyroidism is the most common outpatient cause of hypercalcaemia and is often an incidental finding on routine biochemistry. It is caused by autonomous PTH overproduction, most frequently by a single benign parathyroid adenoma. The classic symptomatic triad – nephrolithiasis, bone pain, and neuropsychiatric symptoms – is now less commonly the initial presentation; many patients are discovered in the asymptomatic hypercalcaemic stage. Serum calcium elevation is the initial clue; PTH measurement then confirms the diagnosis.

Nephrolithiasis - Metabolic Stone Workup

Kidney stones affect approximately one in eleven adults and carry a high recurrence rate without preventive intervention. The serum calcium and uric acid panel forms the initial laboratory component of the metabolic stone workup. Hypercalcaemia suggests a calcium-based stone risk; hyperuricaemia suggests uric acid stone risk or may contribute to calcium oxalate stone formation by seeding crystallisation. Full prevention workup also includes 24-hour urine for calcium, oxalate, uric acid, citrate, pH, and stone analysis if a stone is retrieved.

Metabolic Syndrome

Metabolic syndrome – characterised by abdominal obesity, hypertension, insulin resistance, and dyslipidaemia – is frequently accompanied by hyperuricaemia and by mild hypercalcaemia in patients on thiazide antihypertensives. The panel serves as a useful adjunct to conventional metabolic screening in this population.

Who Should Get This Test

• Patients with a history of kidney stones requiring metabolic workup to prevent recurrence.
• Individuals with recurrent joint pain, documented gout, or a family history of gout needing baseline or follow-up uric acid measurement.
• Patients on long-term thiazide or loop diuretics where periodic calcium and uric acid monitoring is clinically indicated.
• Those with symptoms suggesting hypercalcaemia: fatigue, polyuria, constipation, abdominal pain, or bone pain.
• Patients with metabolic syndrome, obesity, or type 2 diabetes requiring comprehensive metabolic risk assessment.
• Individuals with a family history of gout, hyperparathyroidism, or recurrent kidney stones.

How to Prepare for the Test

Fasting requirements

A fast of eight to ten hours is recommended before this test. Serum uric acid can be transiently elevated by a recent purine-rich meal. Fasting ensures the most representative baseline measurement. Water may be consumed freely. Serum calcium is relatively stable and not significantly influenced by short-term dietary intake, but consistent pre-test conditions improve comparability across serial measurements.

Dietary and medication notes

• Avoid high-purine foods - red meat, organ meats, shellfish, anchovies - for 24 hours before the test if possible, to reduce dietary confounders.
• Avoid alcohol for at least 24 hours before the test, as alcohol accelerates uric acid production and reduces renal urate excretion.
• Inform your doctor and the MAX@Home team about all medications: thiazide or loop diuretics, allopurinol or febuxostat, calcium supplements, and any vitamin D preparations.
• Do not stop prescribed medications before testing without clinical advice. The goal is to capture your current metabolic state on your current treatment.

How to Book with MAX@Home

Booking a home Calcium + Uric Acid test with MAX@Home is straightforward.

1.  Visit the MAX@Home website or call the helpline to schedule your appointment.

2.  Select the Calcium + Uric Acid combination panel and choose a morning fasting slot.

3.  A certified phlebotomist arrives at your chosen time with all necessary sterile collection equipment.

4.  A single venous blood draw is taken and dispatched to a partner NABL-accredited laboratory.

5.  Your digital authenticated report is delivered to your registered email or phone within 24 to 48 hours.