scholarly journals Ketogenic Diet: Biochemistry, Weight Loss and Clinical Applications

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Pramath Kakodkar
Keyword(s):  
Weight Loss ◽  
Ketogenic Diet ◽  
Clinical Applications

scholarly journals European Guidelines for Obesity Management in Adults with a Very Low-Calorie Ketogenic Diet: A Systematic Review and Meta-Analysis

Obesity Facts ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 222-245
Author(s):  
Giovanna Muscogiuri ◽  
Marwan El Ghoch ◽  
Annamaria Colao ◽  
Maria Hassapidou ◽  
Volkan Yumuk ◽  
...  
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Body Composition ◽  
Body Weight ◽  
Side Effects ◽  
Ketogenic Diet ◽  
Meta Analysis ◽  
Dietary Treatment ◽  
Obesity Management ◽  
Weight Loss Interventions

<b><i>Background:</i></b> The very low-calorie ketogenic diet (VLCKD) has been recently proposed as an appealing nutritional strategy for obesity management. The VLCKD is characterized by a low carbohydrate content (&#x3c;50 g/day), 1–1.5 g of protein/kg of ideal body weight, 15–30 g of fat/day, and a daily intake of about 500–800 calories. <b><i>Objectives:</i></b> The aim of the current document is to suggest a common protocol for VLCKD and to summarize the existing literature on its efficacy in weight management and weight-related comorbidities, as well as the possible side effects. <b><i>Methods:</i></b> This document has been prepared in adherence with Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines. Literature searches, study selection, methodology development, and quality appraisal were performed independently by 2 authors and the data were collated by means of a meta-analysis and narrative synthesis. <b><i>Results:</i></b> Of the 645 articles retrieved, 15 studies met the inclusion criteria and were reviewed, revealing 4 main findings. First, the VLCKD was shown to result in a significant weight loss in the short, intermediate, and long terms and improvement in body composition parameters as well as glycemic and lipid profiles. Second, when compared with other weight loss interventions of the same duration, the VLCKD showed a major effect on reduction of body weight, fat mass, waist circumference, total cholesterol and triglyceridemia as well as improved insulin resistance. Third, although the VLCKD also resulted in a significant reduction of glycemia, HbA1c, and LDL cholesterol, these changes were similar to those obtained with other weight loss interventions. Finally, the VLCKD can be considered a safe nutritional approach under a health professional’s supervision since the most common side effects are usually clinically mild and easily to manage and recovery is often spontaneous. <b><i>Conclusions:</i></b> The VLCKD can be recommended as an effective dietary treatment for individuals with obesity after considering potential contra-indications and keeping in mind that any dietary treatment has to be personalized. <b><i>Prospero Registry:</i></b> The assessment of the efficacy of VLCKD on body weight, body composition, glycemic and lipid parameters in overweight and obese subjects: a meta-analysis (CRD42020205189).

Weight loss, improved physical performance, cognitive function, eating behavior, and metabolic profile in a 12-week ketogenic diet in obese adults

2019 ◽  
Vol 62 ◽  
pp. 64-77 ◽  
Author(s):  
Nina Mohorko ◽  
Maša Černelič-Bizjak ◽  
Tamara Poklar-Vatovec ◽  
Gašper Grom ◽  
Saša Kenig ◽  
...  
Keyword(s):  
Weight Loss ◽  
Cognitive Function ◽  
Physical Performance ◽  
Ketogenic Diet ◽  
Eating Behavior ◽  
Metabolic Profile ◽  
Obese Adults

scholarly journals Comparing the Keyto App and Device with Weight Watchers’ WW App for Weight Loss: Protocol for a Randomized Trial

10.2196/19053 ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. e19053
Author(s):  
Sean R Locke ◽  
Kaja Falkenhain ◽  
Dylan A Lowe ◽  
Terry Lee ◽  
Joel Singer ◽  
...  
Keyword(s):  
Weight Loss ◽  
Cardiovascular Risk ◽  
Randomized Trial ◽  
Ketogenic Diet ◽  
Disease Risk ◽  
Cardiovascular Disease Risk ◽  
Ketogenic Diets ◽  
Phone Calls ◽  
Weight Watchers ◽  
The Impact

Background Obesity and being overweight are major contributing factors for many diseases. Calorie restricted diets often fail to result in sustained long-term weight loss. Very low–carbohydrate, high-fat ketogenic diets have been suggested to have superior metabolic and weight loss effects. Keyto is a low-cost, highly scalable mobile health (mHealth) app paired with a noninvasive biofeedback tool aimed at facilitating weight loss through a personalized healthy and predominantly plant- and fish-based ketogenic diet. Objective This protocol describes a randomized trial comparing the efficacy of the Keyto mHealth app and device intervention to that of Weight Watchers’ WW app in individuals who are overweight or obese. The primary outcome is weight loss after 12 weeks. Secondary and exploratory outcomes, including metabolic and cardiovascular risk factors, will be assessed at 12, 24, and 48 weeks. Methods A total of 144 participants will be recruited and randomized to either the Keyto program or Weight Watchers program. Study participants will be guided through the study via video conference or phone calls and will undergo a fasting blood analysis performed by a third-party diagnostic lab at weeks 0 and 12 to assess metabolic and cardiovascular risk markers. All participants will be asked to weigh themselves daily on a study-provided Bluetooth-enabled scale. Participants randomized to the Keyto arm will also be asked to measure their breath acetone levels, a measure of ketosis, with the Keyto device 3 times per day. Results Recruitment started in December 2019. Rolling recruitment is expected to be completed by July 2020. Data collection and analysis of the primary intervention phase is expected to be completed in October 2020. The 24- and 48-week follow-ups are expected to be completed in January 2021 and July 2021, respectively. Conclusions This trial will provide high-quality evidence regarding the efficacy of the Keyto weight loss program in individuals who are overweight and obese in a free-living condition. This study also fills a gap by examining the impact of a ketogenic diet emphasizing plant- and fish-based fats on blood lipid profile and cardiovascular disease risk. Trial Registration ClinicalTrials.gov NCT04165707; https://clinicaltrials.gov/ct2/show/NCT04165707. International Registered Report Identifier (IRRID) DERR1-10.2196/19053

scholarly journals Severe Metabolic Acidosis: A Case of Triple Hit with Ketogenic Diet, Vinegar, and Metformin in an Obese Patient

2020 ◽  
Vol 2020 ◽  
pp. 1-4
Author(s):  
Abdul Mughees Rana ◽  
Kannan Mansoor ◽  
Salman Assad ◽  
Mahmoud Abouzid ◽  
Iheanyichukwu Ogu ◽  
...  
Keyword(s):  
Weight Loss ◽  
Acetic Acid ◽  
Adverse Effects ◽  
Ketogenic Diet ◽  
Herbal Supplements ◽  
Dietary Practices ◽  
Over The Counter ◽  
Mainstream Media ◽  
Ketogenic Diets ◽  
Increased Risk

Obesity is an epidemic with high burden of disease. It is directly proportional to increased risk of morbidity and mortality. Ketogenic diet and herbal supplements have recently gained popularity amongst patients struggling with weight loss. There are limited data available for most of these supplements contrary to the claims laid by the mainstream media. Due to lack of awareness, this patient population is at high risk of adverse effects. We present a case of severe acidosis secondary to ketogenic diet and acetic acid (vinegar) ingestion. The use of dietary acetic acid is usually well tolerated; however, in this case, the large quantities and presence of acute renal injury and metformin use may have worsened the acidosis. Severe ketosis in setting of ketogenic diets is a serious complication, which is infrequently reported in literature. Many of these diets and supplements may seem harmless, but as our case illustrates, when combined with other risk factors, patients can face serious adverse effects and even require hospitalization. It is imperative that such dietary practices are physician supervised to avoid complications. With the recent surge of over-the-counter weight loss supplements and ketogenic diets, physicians also need to engage in dietary discussion with patients when attempting to lose weight.

Fat-Free Mass Changes During Ketogenic Diets and the Potential Role of Resistance Training

2016 ◽  
Vol 26 (1) ◽  
pp. 78-92 ◽  
Author(s):  
Grant M. Tinsley ◽  
Darryn S. Willoughby
Keyword(s):  
Weight Loss ◽  
Resistance Training ◽  
Ketogenic Diet ◽  
Potential Role ◽  
Mass Measurement ◽  
Fat Free Mass ◽  
Exercise Interventions ◽  
Ketogenic Diets ◽  
Low Carbohydrate

Low-carbohydrate and very-low-carbohydrate diets are often used as weight-loss strategies by exercising individuals and athletes. Very-low-carbohydrate diets can lead to a state of ketosis, in which the concentration of blood ketones (acetoacetate, 3-β-hydroxybutyrate, and acetone) increases as a result of increased fatty acid breakdown and activity of ketogenic enzymes. A potential concern of these ketogenic diets, as with other weight-loss diets, is the potential loss of fat-free mass (e.g., skeletal muscle). On examination of the literature, the majority of studies report decreases in fat-free mass in individuals following a ketogenic diet. However, some confounding factors exist, such as the use of aggressive weight-loss diets and potential concerns with fat-free mass measurement. A limited number of studies have examined combining resistance training with ketogenic diets, and further research is needed to determine whether resistance training can effectively slow or stop the loss of fat-free mass typically seen in individuals following a ketogenic diet. Mechanisms underlying the effects of a ketogenic diet on fat-free mass and the results of implementing exercise interventions in combination with this diet should also be examined.

scholarly journals Short-term Ketogenic Diet Induces a Molecular Response that is Distinct from Dietary Protein Restriction

2021 ◽  
Author(s):  
Krystle Kalafut ◽  
Sarah J Mitchell ◽  
Michael R MacArthur ◽  
James R Mitchell
Keyword(s):  
Weight Loss ◽  
Insulin Sensitivity ◽  
Protein Content ◽  
Ketogenic Diet ◽  
Dietary Protein ◽  
Control Diet ◽  
Protein Restriction ◽  
Short Term ◽  
Dietary Protein Restriction ◽  
Ketogenic Diets

There is increasing interest in utilizing short-term dietary interventions in the contexts of cancer, surgical stress and metabolic disease. These short-term diets may be more feasible than extended interventions and may be designed to complement existing therapies. In particular, the high-fat, low-carbohydrate ketogenic diet (KD), traditionally used to treat epilepsy, has gained popularity as a potential strategy for weight loss and improved metabolic health. In mice, long-term KD improves insulin sensitivity and extends lifespan and healthspan. Dietary protein restriction (PR) causes increased energy expenditure, weight loss and improved glucose homeostasis. Since KD is inherently a low-protein diet (10% of calories from protein vs. 20% in control diet), here we evaluated the potential for mechanistic overlap between PR and KD via activation of a PR response. Mice were fed control, protein-free (PF), or one of four ketogenic diets with varying protein content for 8 days. PF and KD diets both decreased body weight, fat mass, and liver weights, and reduced fasting glucose and insulin levels, compared to mice fed the control diet. However, PF and KD differed with respect to insulin tolerance and hepatic insulin sensitivity, which were increased in PF-fed mice and impaired in KD-fed mice relative to controls. Furthermore, contrary to the PF-fed mice, mice fed ketogenic diets containing at least 5% protein did not increase hepatic Fgf21 or brown adipose Ucp1 expression. Interestingly, mice fed KD lacking protein demonstrated greater elevations in hepatic Fgf21 than mice fed a low-fat PF diet. To further elucidate potential mechanistic differences between PF and KD diets and the interplay between dietary protein and carbohydrate restriction, we conducted RNA-seq analysis on livers from mice fed each of the six diets and identified distinct gene sets which respond to dietary protein content, dietary fat content, and ketogenesis. We conclude that KD with 10% of energy from protein does not induce a protein restriction response, and that the overlapping metabolic benefits of KD and PF diets occur via distinct underlying mechanisms.

scholarly journals Effect of the ketogenic diet on glycemic control, insulin resistance, and lipid metabolism in patients with T2DM: a systematic review and meta-analysis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiaojie Yuan ◽  
Jiping Wang ◽  
Shuo Yang ◽  
Mei Gao ◽  
Lingxia Cao ◽  
...  
Keyword(s):  
Weight Loss ◽  
Lipid Metabolism ◽  
Glycemic Control ◽  
Ketogenic Diet ◽  
Fixed Effects ◽  
Meta Analysis ◽  
Fasting Blood Glucose ◽  
Density Lipoprotein ◽  
Systematic Research ◽  
Analysis Model

Abstract Background At present, the beneficial effect of the ketogenic diet (KD) on weight loss in obese patients is generally recognized. However, a systematic research on the role of KD in the improvement of glycemic and lipid metabolism of patients with diabetes is still found scarce. Methods This meta-study employed the meta-analysis model of random effects or of fixed effects to analyze the average difference before and after KD and the corresponding 95% CI, thereby evaluating the effect of KD on T2DM. Results After KD intervention, in terms of glycemic control, the level of fasting blood glucose decreased by 1.29 mmol/L (95% CI: −1.78 to −0.79) on average, and glycated hemoglobin A1c by 1.07 (95% CI: −1.37 to −0.78). As for lipid metabolism, triglyceride was decreased by 0.72 (95% CI: −1.01 to −0.43) on average, total cholesterol by 0.33 (95% CI: −0.66 to −0.01), and low-density lipoprotein by 0.05 (95% CI: −0.25 to −0.15); yet, high-density lipoprotein increased by 0.14 (95% CI: 0.03−0.25). In addition, patients’ weight decreased by 8.66 (95% CI: −11.40 to −5.92), waist circumference by 9.17 (95% CI: −10.67 to −7.66), and BMI by 3.13 (95% CI: −3.31 to −2.95). Conclusion KD not only has a therapeutic effect on glycemic and lipid control among patients with T2DM but also significantly contributes to their weight loss.

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