View clinical trials related to Ketosis.
Filter by:In a recent study (Poffé et al., 2019), we demonstrated that increasing the concentration of ketone bodies in the blood through the ingestion of a ketone ester (KE) post-exercise and just before sleeping time during a 3-week overtraining period resulted in suppression of the physiological symptoms of overtraining. Consistent KE intake improved endurance performance, positively affected the autonomic regulation of the heart, suppressed the increase of nocturnal sympathetic activity, and increased spontaneous energy intake. In addition, KE intake had a positive effect on muscular adaptive response, as evidenced by the significantly increased muscular angiogenesis. Therefore, in this study, we aim to investigate whether the oral administration of ketones after exercise and just before bedtime also has a positive effect on the adaptive response during a well-dosed endurance training program. Since suppression of nocturnal sympathetic activity can positively influence sleep quality, we will also study the effect of KE and the training period on sleep quality. To investigate this, we will use a randomized, placebo-controlled parallel research design. Well-trained male cyclists will participate in a fully controlled intervention period of 8 weeks. During the intervention period, participants will follow a supervised cycling training program (5-7 training sessions per week) with a gradual buildup aimed at improving endurance capacity. Throughout the intervention period, participants will ingest 25g ketone ester or a corresponding placebo after each training session and 30 minutes before bedtime. Endurance performance will be evaluated before the start of the training period (pretest), after week 3 (midtest), after week 7 (posttest) of the training period, and at the end of the training intervention (posttest+taper). Additionally, blood samples will be taken at the pre-test and post-test to analyze markers of hormonal status and inflammation. Muscle biopsies will be taken from the vastus lateralis muscle of the right leg at pretest and posttest to analyze cross-sectional area, muscle fiber typing, angiogenesis, protein synthesis and degradation, mitochondrial function, and energy substrate concentrations. One month after the intervention period, an additional biopsy will be taken to study changes in gene expression (epigenetic modifications). Sleep will be evaluated via polysomnography (PSG) at the pretest, midtest and posttest. Finally, before and after the training period, resting and exercise echocardiography will be taken to investigate investigate structural and morphological changes of the heart.
This outcome of this study will elucidate how the phenotype of the individual modulates the KE metabolic effect. Most studies of KE have been in homogenous populations, usually young, male athletes. However, two striking experiments using identical, body weight adjusted KE doses in healthy and obese individuals found that BHB area under the curve (AUC) and removal was reduced by obesity and poor metabolic health. Similarly, ketone infusion experiments found that diabetes, obesity, and insulin resistance alter BHB metabolism. It is important to determine how obesity affects KE 'sensitivity' (i.e., breakdown and oxidation) because the increasing prevalence of obesity as a function of age. Age may be another important source of variation in ketone metabolism. The genes that control the ketone system are regulated by a cascade of transcription factors and hormones including PPARα and FGF21, which are themselves known to be affected by aging and dietary status, and the cellular protein sensor target of rapamycin (TOR). Aberrant hyperactivation of TOR with aging may reduce ketogenesis, while it was observed that a long-term ketogenic diet specifically up-regulated PPARα activity. Preliminary work revealed substantial changes across mouse lifespan in the expression of ketone-related genes in the liver such as Hmgcs2 (rate limiting for ketone production) and Bdh1 (rate limiting for BHB oxidation) between young, middle-aged, and old mice, with a nadir of gene expression in middle age before increasing again late in life. Substantial age differences were found in response to matched doses of oral KE in mice and in rats. These data may have important implications for treating people of different ages and for translating KE technologies into the Department of VA. Therefore, this project plans to study individual responses to KE ingestion across the lifespan, against the background of varying metabolic health
Diabetic ketoacidosis (DKA), a severe complication of diabetes mellitus (DM), is the leading cause of hospitalization, morbidity and mortality in patients with DM (1). DKA is associated with hyperglycemic crises and featured by metabolic acidosis, the production of ketoacids, volume depletion, and electrolyte imbalance. Due to glucose-induced osmotic polyuria and even emesis, volume depletion is a major cause of acute kidney injury (AKI) in DKA patients (2).
Severe diabetic ketoacidosis (DKA) is a potentially serious complication of diabetes mellitus. The treatment regimen is based on insulin and rehydration. The choice of rehydration solution is a question that remains open. We sought to compare the effect of sodium chloride 0.9% (SC) versus ringer lactate (RL) in the resolution of severe DKA as well as on the variation of electrolytes.
The goal of this blinded, cluster cross-over, randomised controlled trial is to determine whether fluid therapy with Plasma-Lyte® 148 increases the number of days alive and days out of hospital to day-28 compared to 0.9% sodium chloride ('0.9% saline') in critically ill patients presenting to the Emergency Department (ED) and deemed to require admission to a critical care area (ICU, HDU) with moderate to severe diabetic ketoacidosis (DKA).
The goal of this clinical trial is to test ketone bodies in healthy elderly and young individuals. The main question it aims to answer are: • Do ketone bodies improve skeletal muscle function? Participants will ingest a ketone monoester and skeletal muscle function will then be evaluated by: - Special magnetic imaging techniques - Intravenous infusion of tracer-marked nutrients - Performance tests on a ergometer bike and in a dynamometer Researchers will compare the outcomes between within the young and elderly groups and between the young and the elderly group to investigate if age has an effect on the outcomes.
Ketone bodies are a fuel source and signaling molecule that are produced by your body during prolonged fasting or if you consistently eat at low-carbohydrate diet. Blood ketones can be used as a source of energy during fasting and are used by your brain as an alternative source of fuel to glucose. Previous studies have found that ketones, when consumed in form of a supplement drink, can increase blood ketone levels and lower blood glucose, the amount of sugar in your blood. This is of potential interest for individuals with high blood sugar, such as people living with type 2 diabetes. However, how ketone supplements impact metabolism is not fully understood but using high throughput analysis techniques that can characterize hundreds to thousands of metabolites in the blood (known as "metabolomics") may allow researchers to discover novel compounds within the body that are altered by ketone supplements. This will improve our understanding of how ketones impact metabolism and guide future research.
The purpose of this study is evaluating of efficacy of innovative dietary strategy -stimulation of physiological ketosis with Liquid Technology Formula PanTrek, in patients with asthenia and or decreased tolerance to physical and\or mental exertion. PanTrek is a liquid formula of potassium and magnesium salts of beta-oxibutiric acid, ginsenosides and rosmarinic acid.
1. To evaluate that change of platelet-to-lymphocyte Ratio affect the duration of hospital stay and mortality rate of DKA patients 2. To assess the impact of red blood cell distribution width (RDW) on the prognosis of diabetic ketoacidosis patients 3. To evaluate the changes in hematological parameters (RBCs,Hct,Hb,MCV,PLT,WBCs) and their correlations with acidosis level and dehydration during ketoacidosis treatment
Diet can alter blood ketone levels and this in turn may affect exercise capacity. This study will determine if the acute ingestion of a ketone supplement alters cycling exercise efficiency. Participants will perform three trials in a randomized order. Each trial will involve an incremental exercise protocol on a stationary cycle ergometer to volitional fatigue. Participants will ingest either a high or low dose of a ketone supplement or a taste-matched placebo drink prior to exercise. Blood samples will be obtained to assess selected metabolic responses. This study will provide information regarding the effect of ketone supplementation on exercise efficiency.