Effects of Acute Ketone Supplementation on the Brain (KETO-BRAIN)
Effects of Acute Ketone Supplementation on the Brain [KETO-BRAIN]
The purpose of this study is to determine how a ketone ester supplement affects brain function, brain blood flow, and brain metabolism in healthy middle-aged and older adults. Ketones are naturally produced by the body during periods of fasting or carbohydrate restriction and serve as an alternative fuel source for the brain. Researchers are interested in whether increasing blood ketone levels through supplementation can alter brain activity and blood flow in ways that may support healthy brain function.
Participants will consume a ketone ester supplement and a placebo in separate study visits. Brain imaging, blood measurements, and cognitive testing will be used to evaluate the effects of each intervention. Findings from this study will help researchers better understand how ketones influence the healthy aging brain and may provide preliminary data for future studies in populations at risk for cognitive decline.
Przegląd badań
Status
Status
Warunki
Warunki
Interwencja / Leczenie
Interwencja / Leczenie
Szczegółowy opis
Alzheimer's disease and other age-related neurodegenerative conditions are associated with changes in brain energy metabolism that can occur years before symptoms develop. One of the earliest findings in these conditions is reduced utilization of glucose by certain brain regions. Ketones, including beta-hydroxybutyrate, can serve as an alternative fuel source for the brain and may help support brain metabolism when glucose utilization is impaired. Experimental evidence also suggests ketones may influence cerebral blood flow, neurotransmitter balance, and functional brain connectivity.
Despite growing interest in ketone supplementation, the acute effects of ketone esters on multiple aspects of human brain function have not been comprehensively evaluated. This study will investigate whether acute ketone ester ingestion alters cerebral blood flow, brain neurochemistry, resting-state brain connectivity, and cognitive performance in healthy adults.
This is a randomized, double-blind, placebo-controlled crossover study. Participants will complete two intervention periods, receiving a ketone ester supplement during one period and a calorie-matched placebo during the other. The order of interventions will be randomized and separated by a washout period of 3 to 7 days. Participants will consume study beverages for two days prior to each testing session and will undergo detailed testing following an overnight fast.
At each testing visit, participants will provide fingerstick blood samples to measure ketone and glucose concentrations, complete standardized cognitive testing, and undergo advanced magnetic resonance imaging (MRI). Brain imaging will include arterial spin labeling (ASL) to evaluate cerebral blood flow, proton magnetic resonance spectroscopy (1H-MRS) to assess brain metabolite and neurotransmitter concentrations, and functional MRI (fMRI) to assess resting-state brain network connectivity. Cardiac MRI measures will also be collected to explore relationships between cardiovascular and cerebrovascular responses.
The primary goal is to determine whether acute ketone supplementation changes cerebral blood flow, brain metabolite concentrations, and functional brain connectivity compared with placebo. Secondary analyses will evaluate relationships between blood ketone concentrations, imaging measures, and cognitive performance. Results from this pilot study will provide important mechanistic information regarding how ketones affect the healthy aging brain and will support the development of future clinical trials in populations at risk for cognitive impairment.
The study lasts about two weeks. There are two main test days with 3-7 days in between. Each testing session will last up to 3.5 hours at most.
Typ studiów
Typ studiów
Zapisy (Szacowany)
Zapisy
Faza
Faza
- Nie dotyczy
Kontakty i lokalizacje
Kontakt w sprawie studiów
Kontakt w sprawie studiów
- Nazwa: Christopher Crabtree, Ph.D.
- Numer telefonu: 614-688-5623
- E-mail: Christopher.Crabtree@osumc.edu
Lokalizacje studiów
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Ohio
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Columbus, Ohio, Stany Zjednoczone, 43210
- Rekrutacyjny
- The Ohio State University
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Kontakt:
- Christopher Crabtree, Ph.D.
- Numer telefonu: 614-688-5623
- E-mail: Chrisstopher.Crabtree@osumc.edu
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Kryteria uczestnictwa
Kryteria kwalifikacji
Kryteria kwalifikacji
Wiek uprawniający do nauki
- Dorosły
- Starszy dorosły
Akceptuje zdrowych ochotników
Opis
Inclusion Criteria:
- Age ≥45 years and ≤65 years
- Able to comply with study requirements including presenting for each test session following an overnight fast and not following a ketogenic diet during the duration of the study.
- BMI between 18.5 and 30 kg/m2
Exclusion Criteria:
- Non-English Speaking
- Currently taking a ketone ester supplement, ketone salt supplement, or on a ketogenic diet
- Pregnancy, a urine pregnancy test will be given to all women before scanning to confirm nonpregnant status
- Currently breastfeeding
- Allergies to components in the test products, including milk protein, and not lactose intolerant
- History of high blood pressure
- History of alcoholism (previous 2 years)
- History of illicit drug use
- History of head trauma involving loss of consciousness or skull fracture
- Diagnosed neurological disease
- Taking psychiatric prescriptive medications (antipsychotics, antidepressants, or barbiturates) or over-the-counter (OTC) medications (other than those taken as nutritional supplements for non-therapeutic indications)
- Current smoker
- Currently consuming a habitual ketogenic diet, or was consuming a habitual ketogenic diet in the past three months
- Any condition or material in the body that is a contraindication for MRI procedures
Plan studiów
Jak projektuje się badanie?
Szczegóły projektu
- Główny cel: Podstawowa nauka
- Przydział: Randomizowane
- Model interwencyjny: Zadanie krzyżowe
- Maskowanie: Pojedynczy
Liczba ramion
Broń i interwencje
Grupa uczestników / ArmGrupa uczestników / Arm |
Interwencja / LeczenieInterwencja / Leczenie |
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Aktywny komparator: Ketone Supplement drink
Drink contains 25 g of C8 Diester , 50g consumed total per day using split dose
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The ketone ester beverage contains 25 g of C8 Diester emulsified in a matrix of water, whey protein concentrate, modified gum acacia, natural and artificial flavors and cocoa powder. It contains 210 kcal, 0.5 g fat, 2 g carbohydrates, and 2 g protein. Dose consumed is 50 g, 2 times per day for 2 days. The placebo (PL) will be calorie and volume matched to the KE and be formulated with standard dietary ingredients. |
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Komparator placebo: Placebo Drink
Drink contains no ketones, kcal and volume matched
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The placebo drink will be calorie and volume matched to the KE and be formulated with standard dietary ingredients.
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Co mierzy badanie?
Podstawowe miary wyniku
Podstawowe miary wyniku
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Cerebral Blood Flow
Ramy czasowe: Acute response following 2-day lead in
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To detect a clinically meaningful difference in cerebral blood flow (CBF) between ketone ester and placebo conditions in healthy adults
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Acute response following 2-day lead in
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Brain Glutamate Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain glutamate concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain GABA Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain gamma-aminobutyric acid (GABA) concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain Lactate Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain lactate concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain Choline Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain choline concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain N-Acetylaspartate (NAA) Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain N-acetylaspartate (NAA) concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain Glucose Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain glucose concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain Beta-Hydroxybutyrate (BHB) Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain beta-hydroxybutyrate (BHB) concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Functional Brain Connectivity
Ramy czasowe: Acute response following 2-day lead in
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Change in resting-state brain network connectivity measured using blood oxygen level-dependent functional magnetic resonance imaging (BOLD-fMRI).
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Acute response following 2-day lead in
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Brain Acetoacetate Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain acetoacetate concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Brain Glutamine Concentration
Ramy czasowe: Acute response following 2-day lead in
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To detect a difference in brain glutamine concentration (mM) between ketone ester and placebo conditions in healthy adults, measured using proton magnetic resonance spectroscopy (1H-MRS).
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Acute response following 2-day lead in
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Miary wyników drugorzędnych
Miary wyników drugorzędnych
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Blood Ketone Concentration
Ramy czasowe: Acute response following 2-day lead in
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Blood beta-hydroxybutyrate concentrations measured by fingerstick testing.
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Acute response following 2-day lead in
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Blood Glucose Concentration
Ramy czasowe: Acute response following 2-day lead in
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Blood glucose concentrations measured by fingerstick testing.
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Acute response following 2-day lead in
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Cognitive Performance (RBANS Total Scale Score)
Ramy czasowe: Acute response following 2-day lead in
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Total Scale Score on the RBANS, comparing ketone ester and placebo conditions in healthy adults.
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Acute response following 2-day lead in
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Współpracownicy i badacze
Sponsor
Sponsor
Daty zapisu na studia
Główne daty studiów
Rozpoczęcie studiów (Rzeczywisty)
Rozpoczęcie studiów
Zakończenie podstawowe (Szacowany)
Zakończenie podstawowe
Ukończenie studiów (Szacowany)
Ukończenie studiów
Daty rejestracji na studia
Pierwszy przesłany
Pierwszy przesłany
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy wysłany (Rzeczywisty)
Pierwszy wysłany
Aktualizacje rekordów badań
Ostatnia wysłana aktualizacja (Rzeczywisty)
Ostatnia wysłana aktualizacja
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia weryfikacja
Ostatnia weryfikacja
Więcej informacji
Terminy związane z tym badaniem
Słowa kluczowe
Inne numery identyfikacyjne badania
Inne numery identyfikacyjne badania
- STUDY20251460
Plan dla danych uczestnika indywidualnego (IPD)
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Opis planu IPD
Informacje o lekach i urządzeniach, dokumenty badawcze
Bada produkt leczniczy regulowany przez amerykańską FDA
Bada produkt urządzenia regulowany przez amerykańską FDA
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