D- and L-lactate serum levels
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D- and L-lactate serum levels

Lactate, the anion that results from dissociation of lactic acid, is an intracellular metabolite of glucose; specifically it is the end product of anaerobic glycolysis, the final step of which is conversion of pyruvate to lactate by the enzyme lactate dehydrogenase. The two lactate isomers are known as L-lactate and D-lactate. Both forms (stereoisomers) of lactate are produced from and metabolized to pyruvate by the action of the enzyme lactate dehydrogenase (LDH).

D-Lact/ L-Lact: Request Form from EU

D-Lact/ L-Lact: Request Form from USA

Serum-based tests : 2 ml SERUM. Centrifuge immediately after clotting. Keep at ambient temperature or 4°C for 24h. For longer periods, aliquot, freeze and ship frozen.


However, the enzyme is isomer-specific so that production and metabolism of D-lactate requires D-LDH and L-lactate requires L-LDH. Mammalian cells only contain L-LDH so that in humans the lactate produced is almost exclusively L-lactate. Carbohydrate-fermenting bacterial species (e.g. Lactobacillus spp) have by contrast both enzymes and therefore the capacity to produce both D-lactate and L-lactate. Some species produce only D-lactate, some only L-lactate and others both forms.

Tissue hypoxia, which is the result of inadequate perfusion of tissues and/or reduced blood oxygen (hypoxemia), is a common feature of many kinds of critical illness so that lactate measurement is most frequently used to monitor tissue oxygenation in the critically ill patients. L-lactate within the reference range is considered reliable evidence that tissues are adequately oxygenated.

Data sheet
Do I need to prepay the test before receiving the kit?

No, we will send you an invoice once we receive your sample. All payment instructions are listed on the invoice. You can pay by wire transfer or credit card (VISA or Mastercard only). Please kindly note that checks are no longer accepted. The analysis report will be released only if the tests are paid.

What is the turnaround time for the tests?

Testing turnaround time is assay-dependent. Some results are available in 48h (like CD57 count, Phagotest, etc.), while some others need more time (like PCRs with sequencing confirmation). The results of analyses are delivered maximum 6 weeks after sample reception.

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