Lactate (Plasma) Blood Test Marylebone
From 1 October 2026 — until then book at South Kensington or St Paul's. South Kensington · St Paul's
£94
+ £50 phlebotomy fee (per visit)
+ £50 phlebotomy (per visit)
Confidential Results
Secure online portal
Fast Results
1 day"
Professional Service
Experienced phlebotomists
Wimpole Street, Marylebone (opening 1 October 2026)
Opening hours from 1 October 2026
- Monday
- 9am – 6pm
- Tuesday
- 9am – 8pm
- Wednesday
- 9am – 6pm
- Thursday
- 9am – 8pm
- Friday
- 8am – 5pm
- Saturday
- 10am – 4pm
- Sunday
- Closed
- Bond Street — about 6 minutes (Central, Jubilee & Elizabeth lines)
- Oxford Circus — about 7 minutes (Central, Bakerloo & Victoria lines)
Wimpole Street, Marylebone
Lactate (Plasma) is a sports and performance test concerned with lactic Acid, blood Lactate Level and muscle Metabolism, run on a venous blood sample (fluoride oxalate). At Wimpole Street it is priced at £94 for everyone and, from 1 October 2026, a nurse or phlebotomist takes the sample at 22 Wimpole Street, Marylebone. The laboratory quotes 1 day; the report, with reference ranges, is delivered to your secure portal for you to discuss with your GP or a clinician.
Lactate (Plasma)’s place in sports and performance testing
- Sample
- venous blood sample (fluoride oxalate)
- Laboratory turnaround
- 1 day
- Appointment
- 20 minutes
- Standard price
- £94 + £50 phlebotomy per visit
What Lactate (Plasma) measures
Lactate (Plasma) is most often requested in connection with lactic Acid, blood Lactate Level and muscle Metabolism, which is why it sits within the sports and performance group at Wimpole Street.
Sports profiles combine markers that matter to training and recovery: iron stores and full blood count for oxygen carriage, creatine kinase and lactate dehydrogenase for muscle breakdown, testosterone and cortisol for the anabolic–catabolic balance, and vitamin D, magnesium and thyroid function for energy and adaptation. Some add inflammatory markers, kidney and liver function, and urate. Individual tests such as creatine kinase or lactate can also be requested alone.
Who considers Lactate (Plasma)
- People often consider these tests if their performance has plateaued or fallen despite consistent training.
- Runners and cyclists frequently monitor ferritin because endurance training increases iron losses.
- Prolonged muscle soreness, poor recovery between sessions or repeated minor illness may point to overtraining and prompt a check.
- Those preparing for a marathon, triathlon or a demanding expedition often want a pre-season baseline.
- Anyone using protein, creatine or other supplements heavily may check kidney and liver markers periodically.
Preparing for your Lactate (Plasma)
- 1Rest for 48 hours before the sample; hard training raises creatine kinase, liver enzymes and white cells for two to three days and will distort the result.
- 2Book a morning, fasted appointment so testosterone and cortisol are measured at their daily peak and iron is not affected by food.
- 3Creatine supplements raise creatinine; mention them so kidney function is interpreted correctly.
- 4Drink normally — arriving short of fluids concentrates several markers.
Sample for this test: venous blood sample (fluoride oxalate).
Understanding your Lactate (Plasma) results
A low ferritin without anaemia can indicate depleted iron reserves that may limit endurance long before haemoglobin falls, and is common in female athletes. Raised creatine kinase after rest may suggest incomplete recovery or muscle stress, while a falling testosterone-to-cortisol ratio over repeated tests is sometimes used as an indicator of overtraining, although it is not definitive. Reference ranges are derived from the general population, so athletes often sit at the edges — a lower resting heart rate and higher red cell mass, for example — without anything being wrong.
Sports profiles are interpreted against training load, sex and phase of the season, and are not a substitute for medical assessment of persistent symptoms.
Related areas of testing at Wimpole Street: iron and ferritin, male hormones, kidney function and electrolytes, nutrition, vitamins and trace elements.
Pricing
Lactate (Plasma)
Individual test
Phlebotomy Fee
Blood draw by qualified phlebotomist (per visit)
Total
£144Payment is collected at the clinic. The phlebotomy fee is charged once per visit, regardless of the number of tests booked.
From booking the Lactate (Plasma) to reading your result
- 1
Choose your test
Select the Lactate (Plasma) and any others you want run from the same visit. Until 1 October 2026 the identical test can be booked at South Kensington or St Paul’s.
- 2
Nurse-led sample
From 1 October 2026 the venous blood sample (fluoride oxalate) is taken at 22 Wimpole Street, Marylebone by our nursing team, led by Precious Agbonmamwen, Registered Adult Nurse (NMC 20H1641E). Identity is checked and any preparation questions answered first.
- 3
UKAS-accredited laboratory
The sample travels to a UKAS-accredited partner laboratory, whose methods and reference ranges match those used across the NHS and private sectors.
- 4
Laboratory report to your secure portal
The laboratory report is released to your secure portal — typically from 24 hours; the laboratory quotes 1 day for this test. It shows each value against the reference range and flags anything outside it; discuss the report with your GP or a clinician.
Why test at Wimpole Street
Wimpole Street Medical & Dental opens at 22 Wimpole Street on 1 October 2026. Medical services are for patients aged 16 and over; registration with the CQC is in progress ahead of opening.
Wimpole Street, Marylebone (opening 1 October 2026)
- Bond Street — about 6 minutes (Central, Jubilee & Elizabeth lines)
- Oxford Circus — about 7 minutes (Central, Bakerloo & Victoria lines)
- Registration with the CQC is in progress ahead of opening; our South Kensington and St Paul’s clinics are CQC registered.
- Samples are taken by a nurse or phlebotomist at 22 Wimpole Street, Marylebone, in a clinic built for medical and dental care.
- Self-referral: you choose the test and book directly — no GP referral is needed, and the laboratory report is yours to take to your GP or a clinician.
Other tests often considered alongside Lactate (Plasma)
Frequently Asked Questions
A venous blood sample (fluoride oxalate). A nurse or phlebotomist collects it at 22 Wimpole Street, Marylebone from 1 October 2026; the appointment allows time for identity checks and any preparation questions. The laboratory quotes 1 day for this test.
Ready to Book Your Test?
Wimpole Street opens 1 October 2026. Register your interest for the Marylebone diary, or book the same test now at South Kensington or St Paul's.
Important information about the Lactate (Plasma) at Wimpole Street
- Medical services at Wimpole Street Medical & Dental are for patients aged 16 and over.
- This is a self-referral service: you choose the test and book directly — no GP referral is needed.
- Nurse-led by Precious Agbonmamwen, Registered Adult Nurse (NMC 20H1641E), who oversees sample-taking standards, infection control and the patient pathway. The nursing team does not interpret results.
- A laboratory result is not a diagnosis and this page is not a substitute for medical advice. We do not provide clinical interpretation of results — please discuss your report with your GP or a clinician, particularly if a value is flagged or you have symptoms.
- CQC registration for Wimpole Street is in progress ahead of the opening on 1 October 2026; our South Kensington and St Paul’s clinics are CQC registered.
- Your results are held on a secure portal and treated as strictly confidential, except where disclosure is required by law.
- If you are seriously unwell, call 999. For urgent advice that is not an emergency, call NHS 111.
