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Inflammation (CRP) Test

Inflammation (CRP) Test

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  • ✔️ Measures C-reactive protein to detect systemic inflammation at home
  • ✔️ Finger-prick sample — no clinic visit or GP referral needed
  • ✔️ UKAS-accredited laboratory analysis for clinically reliable results
  • ✔️ Results delivered digitally within 2–5 working days of receipt
  • ✔️ Suitable for adults monitoring chronic inflammatory or autoimmune conditions

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What Is a CRP Blood Test at Home?

 

Inflammation is your body's natural response to injury, infection, or illness — but when it becomes persistent, it can signal something more serious. The CRP blood test at home from yorktest measures your level of C-reactive protein (CRP), a substance produced by the liver whenever inflammation is present in the body. It's a simple, convenient way to get a clearer picture of what's happening inside, without needing a GP referral or a trip to a clinic. At just £59.00, it puts meaningful health data directly in your hands.

CRP is one of the most widely used markers of inflammation in clinical medicine. The NHS uses CRP testing routinely to help investigate conditions ranging from infections to autoimmune disorders. If you've been experiencing unexplained fatigue, joint discomfort, or recurring illness, checking your CRP level is a logical first step. You might also find it useful alongside other health monitoring tools — for example, if you're already tracking blood glucose through our diabetes monitoring range, adding an inflammation check gives you a broader view of your metabolic health.

 

How Does the Inflammation CRP Test Work?

 

The test uses a finger-prick blood sample, which you collect yourself at home using the lancet and collection materials included in the kit. Once collected, you post the sample to yorktest's UKAS-accredited laboratory in a pre-paid envelope. The lab analyses your CRP concentration and returns your results digitally — typically within a few working days. The process is straightforward, and the kit includes clear step-by-step instructions.

  • Wash your hands thoroughly and warm your fingertip to encourage blood flow
  • Use the lancet to make a small prick on the side of your fingertip
  • Apply the required number of blood drops to the collection card
  • Allow the sample to dry fully before sealing it in the provided envelope
  • Post the sample and await your results via the yorktest online portal

 

Who Should Consider Using This CRP Test?

 

This test is designed for adults who want to understand their inflammatory status. It's particularly relevant if you have symptoms that could point to underlying inflammation, or if you simply want a baseline reading as part of a proactive health check. It is not intended to diagnose any specific condition — rather, it provides a data point to discuss with your GP.

  • Adults experiencing persistent fatigue, joint pain, or unexplained swelling
  • People with a personal or family history of inflammatory or autoimmune conditions
  • Those managing chronic conditions such as rheumatoid arthritis or inflammatory bowel disease
  • Anyone wanting a general health snapshot as part of a wellness routine

 

How Does the Yorktest CRP Test Compare to a GP Blood Test?

 

Feature Yorktest CRP Test GP / NHS Blood Test
Requires appointment No Yes
Sample collection Finger-prick at home Venous draw at clinic
Result turnaround 2–5 working days Varies (days to weeks)
Cost £59.00 Free on NHS (if referred)
Clinical interpretation included Reference ranges provided GP discusses results directly

 

Is the Yorktest CRP Test Clinically Reliable?

 

Yorktest uses a UKAS-accredited laboratory, meaning the analytical process meets recognised quality standards. That said, the accuracy of any home test depends partly on correct sample collection. Following the instructions carefully — particularly ensuring an adequate blood volume and allowing the sample to dry fully — is essential for a reliable result. If your result falls outside the normal range, you should always follow up with your GP rather than drawing conclusions independently.

It's also worth noting that CRP is a non-specific marker. A raised level tells you inflammation is present, but not where or why. Think of it as a flag, not a diagnosis. If you're managing a condition that involves chronic pain, you may also find our pain relief collection helpful while you await further investigation.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Inflammation (CRP) Test specifications
Treatment category Diagnostic / Health Monitoring
Mechanism of action Measures C-reactive protein (CRP) concentration in blood as a marker of systemic inflammation
Effective for Detecting elevated inflammation levels in adults
Suitable for Adults aged 18 and over
Active ingredient N/A — diagnostic test
Pack size 1 test kit
UK classification General Sale / Diagnostic Device
Preparation Finger-prick blood collection card
Route of administration Finger-prick blood sample (sent to laboratory)

Specifications of Inflammation (CRP) Test

 

What Is the Yorktest Inflammation CRP Test and What Is It Used For?

 

The yorktest Inflammation (CRP) Test is an at-home blood test that measures the concentration of C-reactive protein in your blood. CRP is produced by the liver in response to inflammation — whether caused by infection, injury, or an underlying chronic condition. The NHS uses CRP as a standard clinical marker to help assess the likelihood and severity of inflammatory processes in the body.

This test is used to provide an indication of whether inflammation is present and at what level. It does not diagnose any specific condition. Results are intended to support a conversation with your GP, not replace one. Normal CRP levels are generally below 10 mg/L; levels above this threshold may warrant further investigation.

 

What Do You Need to Know Before Using This CRP Test?

 

Before using this test, there are several important considerations to be aware of. This is a screening tool, not a diagnostic device. A single elevated result does not confirm disease, and a normal result does not rule out all health problems.

Do not use this test if:

  • You are under 18 years of age
  • You have a bleeding disorder or are taking anticoagulant medicines such as warfarin — finger-prick sampling may carry additional risk
  • You are unable to follow the sample collection instructions accurately
  • You are looking for a definitive diagnosis — this test cannot provide one

Important warnings:

  • CRP levels can be temporarily elevated by recent infection, surgery, or physical injury — results should be interpreted in context
  • Pregnancy naturally raises CRP; consult your midwife or GP before testing if pregnant
  • Certain medications, including statins and corticosteroids, may affect CRP levels
  • Always share your results with a qualified healthcare professional before making any health decisions

Known interactions:

  • Statins (e.g. atorvastatin) — may lower CRP levels, potentially masking inflammation
  • Corticosteroids (e.g. prednisolone) — anti-inflammatory effect may suppress CRP
  • Non-steroidal anti-inflammatory drugs (NSAIDs) — may reduce CRP readings

 

How Should You Use the Yorktest CRP Test?

 

Using this test correctly is essential for an accurate result. Follow the instructions included in your kit carefully. If you are unsure at any stage, contact yorktest's customer support before proceeding.

  1. Register your kit online at the yorktest website before collecting your sample
  2. Wash your hands with warm water and soap for at least 20 seconds, then dry thoroughly
  3. Warm your fingertip by rubbing it or holding it under warm water to encourage blood flow
  4. Use the lancet provided to prick the side of your middle or ring finger
  5. Gently squeeze your finger to encourage blood flow — do not milk aggressively
  6. Apply the required number of blood drops to the designated circles on the collection card
  7. Allow the card to air-dry completely (at least 30 minutes) before placing it in the biohazard bag
  8. Seal the bag, place it in the pre-paid return envelope, and post it as soon as possible
  9. Check your results via the yorktest online portal once notified by email
Indication Age Group Test Frequency Notes
General health screening Adults 18+ As needed / annually Discuss results with GP
Monitoring known inflammatory condition Adults 18+ As directed by clinician Use alongside clinical review
Post-illness check Adults 18+ Once, after recovery Allow 4 weeks after acute illness

 

What Are the Possible Side Effects of This CRP Test?

 

Because this is a diagnostic test rather than a medicine, side effects are minimal and relate solely to the finger-prick blood collection process. There are no systemic side effects.

Common side effects:

  • Brief, mild pain or stinging at the finger-prick site
  • Small drop of blood or minor oozing after lancing
  • Temporary redness around the puncture site

Less common side effects:

  • Small bruise at the collection site, particularly if multiple attempts are needed
  • Light-headedness in individuals who are sensitive to blood or needles — sit down before collecting your sample if this applies to you
  • Infection at the puncture site if the area is not kept clean (extremely rare with correct technique)

If you experience prolonged bleeding that does not stop within a few minutes, seek medical advice. If you feel faint during or after sample collection, sit or lie down immediately and do not drive until you feel fully recovered. You might also find it helpful to browse our first aid range for wound care supplies to keep on hand.

 

How Should You Store the Yorktest CRP Test?

 

Correct storage ensures the test components remain viable and your results are accurate. Check the expiry date on the outer packaging before use — do not use the kit if it has expired.

  • Store at room temperature (15–25°C)
  • Keep away from direct sunlight, heat sources, and moisture
  • Do not refrigerate or freeze the kit
  • Keep out of reach of children
  • Once the collection card has been used, allow it to dry fully before sealing — do not store a wet sample
  • Post the completed sample promptly — do not leave it sitting for more than 24 hours before posting

If you're building a broader home health monitoring routine, our electrical health and diagnostic collection includes a range of devices to complement your testing.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy the yorktest Inflammation CRP Test online in the UK?

You can order the yorktest Inflammation (CRP) Test directly from Cured Pharmacy for £59.00. It is supplied by a GPhC-registered online pharmacy and dispatched to your home address. No GP referral is needed to purchase this test.

How does a CRP blood test at home actually work?

You use a lancet to collect a small finger-prick blood sample, which you apply to a collection card and post to yorktest's accredited laboratory. The lab measures the concentration of C-reactive protein in your sample and returns your results digitally. The whole process from collection to results typically takes around 2–5 working days after the lab receives your sample.

What does a high CRP level mean for my health?

A raised CRP level indicates that inflammation is present somewhere in the body, but it does not identify the specific cause or location. Levels above 10 mg/L are generally considered elevated, and anything above 100 mg/L warrants urgent medical review. You should always share an elevated result with your GP so they can arrange further investigations if needed.

How accurate is the yorktest CRP test compared to a hospital test?

The yorktest laboratory is UKAS-accredited, meaning it meets recognised quality standards for analytical accuracy. The main variable with home testing is sample collection — an insufficient blood volume or an improperly dried card can affect results. Following the instructions precisely gives you the most reliable outcome, but always treat results as a guide rather than a definitive clinical finding.

Who is eligible to use the yorktest Inflammation CRP Test?

The test is suitable for adults aged 18 and over who want to check their inflammation levels at home. It is particularly relevant for people with unexplained fatigue, joint pain, or a history of inflammatory conditions. It is not suitable for children, and those on anticoagulant therapy or with bleeding disorders should consult their GP before using a finger-prick test.

How long does it take to get my CRP test results?

Results are typically available within 2–5 working days of the laboratory receiving your posted sample. You will receive an email notification when your results are ready to view through the yorktest online portal. Postal transit time is not included in this estimate, so factor in an extra 1–2 days for delivery to the lab.

What is a normal CRP level in the UK?

In the UK, a CRP level below 10 mg/L is generally considered within the normal range. Levels between 10 and 100 mg/L suggest moderate inflammation, which may be caused by infection, injury, or a chronic condition. Levels above 100 mg/L indicate significant inflammation and should prompt urgent contact with your GP.

Can I use this test if I am pregnant?

CRP levels can rise naturally during pregnancy, which means results may be harder to interpret without clinical context. If you are pregnant, speak to your midwife or GP before using this test. They can advise whether testing is appropriate and help you understand what your result means in the context of your pregnancy.

Do any medicines affect my CRP test result?

Yes — certain medicines can influence CRP levels and therefore affect your result. Statins, corticosteroids, and NSAIDs all have anti-inflammatory properties that may lower CRP readings, potentially masking underlying inflammation. Always inform your GP of any medications you are taking when discussing your results.

How do I collect my blood sample correctly for the CRP test?

Wash and warm your hands thoroughly before starting, as warm fingers bleed more freely. Use the lancet to prick the side of your middle or ring finger, then gently squeeze — avoid aggressive milking, which can dilute the sample with tissue fluid. Apply the required drops to the collection card, allow it to dry for at least 30 minutes, and post it promptly in the pre-paid envelope.

What are the alternatives to the yorktest CRP test?

The main alternative is a CRP blood test ordered by your GP through the NHS, which is free but requires a referral and appointment. Other private laboratories also offer CRP testing as part of broader blood panels. If you're monitoring general health, you might also consider other home diagnostic tools available in our electrical health and diagnostic collection.

How often should I repeat a CRP blood test at home?

There is no fixed recommended frequency for home CRP testing — it depends on your individual health circumstances. If you are monitoring a known inflammatory condition, your clinician will advise on testing intervals. For general wellness screening, once or twice a year is a reasonable approach, though you should always discuss repeat testing with your GP.

What should I do if my CRP result is elevated?

If your result is above 10 mg/L, contact your GP to discuss the finding. Do not attempt to self-diagnose or self-treat based on the result alone. Your GP may arrange further blood tests, imaging, or a clinical examination to identify the underlying cause of the raised CRP.

Is the yorktest CRP test suitable for people with IBS or digestive conditions?

CRP testing can be relevant for people with inflammatory bowel conditions, as raised CRP may indicate active gut inflammation. However, it cannot distinguish between inflammatory bowel disease and irritable bowel syndrome — IBS does not typically raise CRP. If you have digestive symptoms, explore our IBS and cramps range and speak to your GP about appropriate investigations.

What are the latest research findings on CRP as an inflammation marker?

CRP remains one of the most widely studied and clinically validated markers of systemic inflammation. Research continues to explore its role as a predictor of cardiovascular risk, with studies suggesting that high-sensitivity CRP (hs-CRP) testing may help stratify cardiac risk in otherwise healthy individuals. The standard CRP test in this kit measures total CRP, which is most useful for detecting active inflammation rather than cardiovascular risk stratification.

How Should You Use the Yorktest Inflammation CRP Test?

Using this test correctly is the single most important factor in getting a reliable result. Before you begin, register your kit on the yorktest website — you'll need the unique barcode printed on your collection card. Do not skip this step, as unregistered samples cannot be processed by the laboratory.

What Is the Correct Dose of the Yorktest CRP Test?

This is a single-use diagnostic test, not a medicine, so there is no dosage in the traditional sense. Each kit contains one collection card and is designed for a single test episode. The table below outlines recommended usage by indication to help you understand when and how often testing may be appropriate.

When Is the Best Time to Use the Yorktest CRP Test?

There is no strict requirement to test at a specific time of day, but morning testing is generally recommended. CRP levels are relatively stable throughout the day, but collecting your sample before eating, drinking anything other than water, or engaging in strenuous exercise helps minimise variables that could influence your result. Avoid testing during or immediately after an acute illness, recent surgery, or significant physical injury, as these events temporarily raise CRP regardless of any underlying condition — waiting at least four weeks after recovery gives a more representative baseline reading.

How Long Can You Use the Yorktest CRP Test For?

Each kit is a single-use product. Once you have collected and posted your sample, the kit is complete. If you wish to retest — for example, to monitor a known condition or track changes over time — you will need to purchase a new kit for each test episode. There is no clinical limit on how many times you can test, but repeat testing should be guided by your GP or specialist rather than done in isolation. Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of the Yorktest CRP Test?

Because this is a diagnostic test rather than a medicine, side effects are limited to those associated with the finger-prick blood collection process. There are no systemic or pharmacological side effects. Most people find the process straightforward and experience only minimal discomfort.

  • Brief, mild stinging or pain at the puncture site lasting a few seconds
  • A small drop of blood or minor oozing immediately after lancing
  • Temporary redness or tenderness around the puncture site

What Are the Less Common Side Effects of the Yorktest CRP Test?

A small number of people may experience slightly more noticeable reactions, particularly if multiple lancet attempts are needed or if the skin is particularly sensitive. These effects are generally mild and resolve quickly without treatment.

  • A small bruise at the collection site, especially if the finger was squeezed firmly
  • Prolonged minor bleeding — apply gentle pressure with a clean tissue for 2–3 minutes
  • Skin irritation if the adhesive plaster provided causes a reaction in those with sensitive skin

What Are the Serious Side Effects of the Yorktest CRP Test?

Serious adverse effects from a finger-prick blood test are extremely rare. However, there are a small number of situations that require prompt attention. If bleeding from the puncture site does not stop within five minutes despite sustained pressure, seek medical advice. In very rare cases, infection can develop at the puncture site — signs include increasing redness, warmth, swelling, or discharge appearing in the days following the test. If you notice any of these signs, contact your GP.

What Should You Do If You Experience Side Effects?

For minor discomfort or bruising, no specific treatment is needed beyond keeping the area clean and dry. If you feel faint or light-headed during or after sample collection — which can happen in people who are sensitive to blood or needles — sit or lie down immediately, and do not drive until you feel fully recovered. It is a good idea to have someone with you when collecting your sample if you know you are prone to vasovagal reactions. If you experience any side effect that concerns you, contact your pharmacist or GP for advice.

Can the Yorktest CRP Test Interact With Other Medicines?

The test itself does not interact with medicines, as it is a diagnostic device rather than a drug. However, certain medicines can affect your CRP level and therefore influence how your result should be interpreted. Statins, corticosteroids, and non-steroidal anti-inflammatory drugs (NSAIDs) all have anti-inflammatory properties that may lower CRP readings. Conversely, some medicines — including certain immunosuppressants — may affect immune function in ways that alter CRP production. Always tell your GP which medicines you are taking when discussing your results, so they can interpret the finding accurately. If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

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Content last updated: 31 Mar 2025

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