Citrate

ChemistryAlso known as: Citric acidmmol/mol creatinine

Measures citrate concentration in blood to assess metabolic function and kidney stone risk.

Normal Range
100 – 200 umol/L
umol/L
Abnormal Levels
< 24 mmol/mol creatinine
> 1174 mmol/mol creatinine
Specimen Type
Blood

Why This Biomarker Matters

Citrate levels affect kidney stone formation and bone health. Low citrate increases kidney stone risk, while abnormal levels may indicate metabolic disorders requiring intervention.

Understanding Your Results

Normal Range

100 – 200 umol/L

Optimal Ranges

Clinician-defined 4-point reference thresholds (mmol/mol creatinine)

Default Range

24
24
1174
1174
Low
24 mmol/mol creatinine
Borderline Low
24 mmol/mol creatinine
Optimal
1174 mmol/mol creatinine
Borderline High
1174 mmol/mol creatinine

Overview

Citrate is an organic acid that plays important roles in energy metabolism and bone health. Blood citrate levels reflect metabolic function and can indicate metabolic disorders or mineral imbalances. Citrate is also critical for preventing kidney stone formation—low citrate increases stone risk while adequate levels provide protection. Testing is sometimes ordered to evaluate kidney stone formation risk, assess metabolic acidosis, or investigate abnormal mineral metabolism. Citrate supplementation is occasionally used therapeutically to prevent recurrent kidney stones, making baseline measurement useful for treatment monitoring.

Research & Evidence

100 publications

Sort:

Research data from MEDLINE/PubMed · 100 articles

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

15038-3Primary
Citrate [Moles/volume] in Serum or Plasma
umol/L
14650-6
Citrate [Moles/time] in 24 hour Urine
mmol/(24.h)
2127-9
Citrate [Mass/volume] in Serum or Plasma
ug/mL
2128-7
Citrate [Mass/volume] in Urine
ug/mL
21203-5
Citrate [Mass/volume] in 24 hour Urine
mg/L
6687-8
Citrate [Mass/time] in 24 hour Urine
mg/(24.h)
57337-8
Citrate [Mass/volume] in 12 hour Urine
mg/L
57338-6
Citrate [Mass/volume] in 2 hour Urine
mg/L
57339-4
Citrate [Mass/time] in 12 hour Urine
mg/(12.h)
25876-4
Citrate [Moles/volume] in 24 hour Urine
nmol/L
2126-1
Citrate [Mass/volume] in Semen
ug/mL
10567-6
Citrate [Moles/volume] in Semen
mmol/L
27133-8
Citrate [Presence] in Urine
34266-7
Citrate [Moles/volume] in Urine
mmol/L
41022-5
Citrate [Molar amount] in Urine collected for unspecified duration
mmol

Available Lab Tests

Order tests that measure this biomarker