Lactate Test
A blood test that measures lactate, which rises when tissues don't get enough oxygen, as in sepsis or shock.
Quick Summary
To assess severity in sepsis and shock in hospital.
Lactate level.
Done in hospital.
Overview
High lactate is a warning sign in serious illness.
It's often repeated to check response to treatment.
What It Measures
Lactate
Blood level.
How It's Performed
- 01
Preparation
Usually no special preparation unless your doctor advises.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm.
- 03
Afterwards
Press on the spot; a small bruise is common.
Reference Ranges
Note: Normal ranges vary by laboratory. Consult your report for the specific reference used.
| Parameter | Typical Range (Adult) | Units |
|---|---|---|
| Lactate | 0.5–2.0 | mmol/L |
Interpreting Results & Next Steps
Discuss with Doctor
Normal ranges differ between laboratories; use the range on your report. Your doctor will explain what your result means and what happens next.
If values are High:
High lactate suggests poor oxygen delivery to tissues.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Lactate Test(opens in a new tab) · MedlinePlus, US National Library of Medicine