Strategies to Augment Ketosis: Optimization of Ketone Delivery Strategies

2022H0160

One important difference between KE compounds is the ketone-promoting components, which determines the circulating ratio of blood ketone bodies, BHB and AcAc, and may in turn lead to important metabolic and signaling differences. Whereas some actions of the ketone bodies BHB and AcAc are shared, R-BHB has a broad range of signaling functions that are distinct from AcAc, some of which are shared by the non-circulating, non-oxidizable enantiomer, S-BHB. AcAc also has metabolic and signaling actions that are independent of BHB and is selectively oxidized in some cells that cannot oxidize BHB. Furthermore, responses to different ketone bodies vary between tissue types. A second difference between KE arises from the balance between direct delivery of ketones compared to indirectly elevating ketone concentration via metabolism of non-classical or classical ketogenic precursors. Classical ketogenesis itself may drive adaptation and some of the functional benefits associated with ketosis. BDO is included in all of the KE compounds, but it is currently unknown how consumption of BDO alone, and its metabolism via non-classical ketogenesis acutely affects metabolism. Additionally, ketogenesis is now understood to occur in certain cells outside the liver with important local biological effects, for example ketogenesis driven by medium chain fatty acids has been reported in astrocytes in vitro. Provision of systemic BHB by a KE may elicit different biological effects in some tissues such as the brain versus promoting in situ ketogenesis in that tissue. Overall, not only are functional effects of KE incompletely defined, but also it is unknown which effects are common to all KE versus which are specific to an individual KE compound (i.e., BHB Monoester vs AcAc Diester) or which may be attributable to the BDO precursor common to all of the KE. This study will be the first comparative full crossover study of all available KE and the precursor BDO at two serving sizes. Outcomes will focus on established effects of the BHB Monoester (including the effects on ketones, glucose and acid-base balance) and compare these with the effects of the AcAc Diester, C8 Ketonef Diester and BDO.

2023-06-05

2026-09-01

2027-09-01

Recruiting

15

Inclusion Criteria: * Male * BMI between 18 and 29 kg/m2 * Aged 20 - 30 years * Participant is willing and able to comply with all study procedures including the following prior to Test Days: fasting (\>10 h; water only), no alcohol (\>24 h), no exercise (\>24 h), no acute illness and controlled feeding before each Test Day, maintain diet, exercise, medication, and supplement habits throughout the study. * Participant has no health conditions that would prevent completion of the study requirements as judged by the Investigator based on health history. * Participant understands the study procedures and signs forms providing informed consent to participate in the study and authorizes the release of relevant protected health information to the Investigator. Exclusion Criteria: * Participant follows a low-carbohydrate diet (\<30% energy from carbohydrate) or have used exogenous ketone supplements within 4-months of study participation. * Participant has a Primary Care Physician diagnosed history or presence of uncontrolled and/or clinically important hypertension (blood pressure \>150/95 mmHg), pulmonary, cardiac, hepatic, renal, endocrine (including type 1 and 2 diabetes), hematologic, immunologic, neurologic (e.g., Alzheimer's or Parkinson's diseases), psychiatric (including unstable depression and/or anxiety disorders) or biliary disorders. * Participant has a known allergy, intolerance, or sensitivity to any of the ingredients in the study beverages, including soy and milk protein, wheat, shellfish, fin fish, eggs, tree nuts or peanuts (production facility handles nuts). * Participant has unstable use of a medication or supplement that the Investigator considers may affect the outcomes of the trial. * Consumption of alcohol more than 3 drinks per day or more than 18 drinks per week. * Consumption of tobacco. * Consumption of cannabis. * Participant is currently in another research study or has been in the 14 days before screening. * Participant has had a blood draw or donation in the last 8 weeks. * Participant has a clinically important gastrointestinal (GI) condition that would potentially interfere with the evaluation of the study beverage \[e.g., inflammatory bowel disease, irritable bowel syndrome, chronic constipation, severe constipation (in the opinion of the Investigator), history of frequent diarrhea, history of surgery for weight loss, gastroparesis, systemic disease that might affect gut motility according to the Investigator, medication managed reflux and/or clinically important lactose intolerance\]. * Participant has a condition the Investigator believes would interfere with his ability to provide informed consent, comply with the study protocol, which might confound the interpretation of the study results, or put the participant at undue risk.

{'studyType': 'INTERVENTIONAL', 'phases': ['NA'], 'designInfo': {'allocation': 'RANDOMIZED', 'interventionModel': 'CROSSOVER', 'primaryPurpose': 'BASIC_SCIENCE', 'maskingInfo': {'masking': 'NONE'}}, 'enrollmentInfo': {'count': 15, 'type': 'ESTIMATED'}}

2023-10-06