Ketone Monoester Supplements, High Altitude, and Brain Blood Flow During Exercise

NCT ID: NCT07063732

Last Updated: 2025-07-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

14 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-05-28

Study Completion Date

2025-08-31

Brief Summary

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The purpose of this trial is to investigate the effect of acute ketone monoester ingestion (0.6 g KME/kg body weight) on the occurrence of the ventilatory threshold and the subsequent response of blood velocity in cerebral arteries during a maximal exercise test at low altitude and high altitude.

Detailed Description

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Conditions

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High Altitude Hypoxia Exercise

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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High Altitude (3800m; Barcroft Research Station)

High altitude setting

Group Type EXPERIMENTAL

Ketone Monoester (KME)

Intervention Type DIETARY_SUPPLEMENT

0.6 g KME per kg body mass; \[R\]-3-hydroxybutyl \[R\]-3-hydroxybutyrate. (Delta G Ketone, TΔS, Oxford).

Placebo

Intervention Type DIETARY_SUPPLEMENT

Inert, calorie-free placebo drink that is taste-matched to the ketone monoester supplement

Low Altitude (334m; University of Guelph)

Low altitude setting

Group Type EXPERIMENTAL

Ketone Monoester (KME)

Intervention Type DIETARY_SUPPLEMENT

0.6 g KME per kg body mass; \[R\]-3-hydroxybutyl \[R\]-3-hydroxybutyrate. (Delta G Ketone, TΔS, Oxford).

Placebo

Intervention Type DIETARY_SUPPLEMENT

Inert, calorie-free placebo drink that is taste-matched to the ketone monoester supplement

Interventions

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Ketone Monoester (KME)

0.6 g KME per kg body mass; \[R\]-3-hydroxybutyl \[R\]-3-hydroxybutyrate. (Delta G Ketone, TΔS, Oxford).

Intervention Type DIETARY_SUPPLEMENT

Placebo

Inert, calorie-free placebo drink that is taste-matched to the ketone monoester supplement

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

\- Must be a member of the research expedition team travelling to the Barcroft Research Station in White Mountain California

Exclusion Criteria

* BMI \> 30
* No prescribed medications (oral contraceptives excluded)
* History of smoking
* Currently following a ketogenic diet or consuming exogenous ketogenic supplements
* History of heart, lung, blood vessel, or kidney disease
* Currently pregnant
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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McMaster University

OTHER

Sponsor Role lead

Responsible Party

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Jeremy Walsh

Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Barcroft Research Station

Bishop, California, United States

Site Status RECRUITING

University of Guelph

Guelph, Ontario, Canada

Site Status RECRUITING

Countries

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United States Canada

Facility Contacts

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Jeremy Walsh, PhD

Role: primary

9055259140

Jeremy Walsh, PhD

Role: primary

9055259140

References

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Gaskill SE, Ruby BC, Walker AJ, Sanchez OA, Serfass RC, Leon AS. Validity and reliability of combining three methods to determine ventilatory threshold. Med Sci Sports Exerc. 2001 Nov;33(11):1841-8. doi: 10.1097/00005768-200111000-00007.

Reference Type BACKGROUND
PMID: 11689733 (View on PubMed)

Other Identifiers

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KETEX_WM

Identifier Type: -

Identifier Source: org_study_id

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