ClinicalTrials.gg
CompletedNCT04299815Updated Sep 30, 2020

Lactate in the Gut

An interventional study of Oral Sodium Lactate and Intravenous sodium lactate in Lactate, Healthy and Hyperlactatemia, sponsored by University of Aarhus. Completed at 1 site in Denmark. Open to male participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-09-30.

Sponsored by University of Aarhus · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
10
Allocation
Non-randomized
Ages
18 Years to 50 Years
Sex
Male
01

Study summary

Lactate is formed naturally in the body in example during physical activity. However, lactate is also formed during food fermentation where certain bacterial strains form lactate. Lactate can also be produced chemically. An example of this is Ringer-lactate which is used for volume replacement when treating dehydrated patients.

As a source of carbon-molecules, lactate is believed to be an important oxidative fuel source in all major organs and yields adenosine triphosphate (ATP) production through Krebs cycle, the Electron Transport Chain in the mitochondria as well as by being a key precursor for gluconeogenesis.

Metformin is the first drug of choice for type 2 diabetes treatment. Use of metformin often results in a small but significant weight loss in overweight users. It is known that metformin increases the lactate concentration in the gut. It is also known also know that metformin use is associated with an increase in blood concentrations of growth differentiation factor 15 (GDF-15). Receptors for GDF-15 can be found in parts of the brain associated with control of appetite. In rats increases in [GDF-15] results in a decrease in appetite and thus weight loss. GDF-15 is thought to be involved in the normal energy homeostasis.

With this study the investigators want to examine the hormonal, metabolic and mechanical effects of lactate in the gut in healthy volunteers. Our hypothesis is that lactate has beneficial effects which may be though an increase in GDF-15 in the blood.

Volunteers will undergo two study days separated by at least 7 days and a maximum of 1 month.

  • On day one volunteers will drink a sodium-lactate solution (intervention). The investigators will also administrate 1500mg paracetamol to assess gastric emptying and do blood samples over 4 hours. The investigators measure [lactate] every 15 min. Every hour the investigators will ask volunteers questions regarding hunger and thoughts of future food intake (questionnaire). After 4 hours of blood sampling the investigators will serve volunteers an all-you-can-eat meal of sandwich and measure how must they ate.
  • On day two volunteers will drink a sodium chloride solution. Furthermore, the investigators administrate intravenous D/L sodium lactate in order to reach the same plasma [lactate] on day 2 as was done on day 1. The rest of day two is identical to day 1.
02

Conditions studied

  • Lactate
  • Healthy
  • Hyperlactatemia

Keywords

  • lactate
  • metabolism
  • Gastric emptying
  • GDF-15
  • insulin
  • incretin hormones
03

In context

Hyperlactatemia

50 studies on the registry are indexed under Hyperlactatemia; 7 are open to participants now.

This study's enrollment of 10 is below the median of 38 across 32 interventional studies indexed under Hyperlactatemia.

Browse Hyperlactatemia studies →

Lead sponsor

University of Aarhus is the lead sponsor of 1,300 studies on the registry; 189 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male gender
  • Age 18-50 years
  • 20-30 kg/m2
  • In good health with no daily use of prescription medicine based on medical history, clinical examination and blood samples.
  • Spoken and written

Exclusion criteria

Exclusion Criteria:

  • Chronic illness or daily use of prescription medicine .
  • Abnormal screening blood samples as judged by the PI
  • Does not understand or speak Danish
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
10 participants (actual)

Study arms

  • Active comparator
    Oral lactate

    Sodium D/L lactate solution, 25g/L in 300mL water

    Drug: Oral Sodium Lactate

  • Placebo comparator
    Iso-lactic intravenous lactate infusion

    iv sodium D/L lactate to elevate \[lactate\] to the same levels as measured on day 1 + oral sodium chloride, 300 mL

    Drug: Intravenous sodium lactate

Interventions

  • 25 grams of D/L lactate dissolved in 300mL water.

  • DrugIntravenous sodium lactate

    intravenous sodium lactate + oral sodium-chlorid solution

06

What researchers measure

Primary outcomes

  1. GDF-15

    Difference in \[GDF-15\] between intervention and placebo

    Time frame: 4 hours

Secondary outcomes

  1. glucagon-like peptide -1

    Difference in \[glucagon-like peptide -1\] between intervention and placebo

    Time frame: 4 hours

  2. Gastric inhibitory peptide (GIP)

    Difference in plasma \[GIP\] between intervention and placebo

    Time frame: 4 hours

  3. free fatty acid

    Difference in \[free fatty acid \] between intervention and placebo

    Time frame: 4 hours

  4. cholecystokinin

    Difference in \[cholecystokinin\] between intervention and placebo

    Time frame: 4 hours

  5. Ghrelin

    Difference in \[Ghrelin\] between intervention and placebo

    Time frame: 4 hours

  6. Gastrin

    Difference in \[Gastrin\] between intervention and placebo

    Time frame: 4 hours

  7. C-peptide

    Difference in \[C-peptide\] between intervention and placebo

    Time frame: 4 hours

  8. glucose

    Difference in \[glucose\] between intervention and placebo

    Time frame: 4 hours

  9. gastric emptying

    \[Paracetamol\] to asses gastric emptying

    Time frame: 4 hours

  10. Evaluation of hunger

    Evaluation of hunger, thoughts of future food intake ect using a questionnaire

    Time frame: 4 hours

07

Study locations

1 site
  • Aarhus University Hospital
    Aarhus, 8200, Denmark
08

References and documents

Publications

  • Pedersen MGB, Sondergaard E, Nielsen CB, Johannsen M, Gormsen LC, Moller N, Jessen N, Rittig N. Oral lactate slows gastric emptying and suppresses appetite in young males. Clin Nutr. 2022 Feb;41(2):517-525. doi: 10.1016/j.clnu.2021.12.032. Epub 2021 Dec 24. Erratum In: Clin Nutr. 2024 May;43(5):1180. doi: 10.1016/j.clnu.2024.03.019. PubMed 35016146 ↗
09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Apr 2020 to primary completion in Jul 2020, 3 months.

Of 17 interventional studies with no phase under Hyperlactatemia, half reached primary completion within 8 months of starting (the median), counting those still running; a quarter within 3 and three quarters within 12. This study's 3 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 5, 2020
First posted
Mar 9, 2020
StartActual
Apr 1, 2020
Primary completionActual
Jul 29, 2020
CompletionActual
Jul 29, 2020
Last update
Sep 30, 2020
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 30, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04299815
Responsible party
Sponsor
First posted
Mar 9, 2020
Start date
Apr 1, 2020
Primary completion
Jul 29, 2020
Completion
Jul 29, 2020
Last update
Sep 30, 2020

Study contacts

Nikolaj Rittig, postdoc
study chair · Steno Diabetes Center Aarhus (SDCA), Aarhus universitetshospital

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2020. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: Sodium Lactate

Start the discussion