scholarly journals Very low-calorie diet in candidates for bariatric surgery: change in body composition during rapid weight loss

Clinics ◽  
2019 ◽  
Vol 74 ◽  
Author(s):  
Marcela Pires Serafim ◽  
Marco Aurelio Santo ◽  
Alexandre Vieira Gadducci ◽  
Veruska Magalhães Scabim ◽  
Ivan Cecconello ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Body Composition ◽  
Rapid Weight Loss ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet

Effectiveness, Compliance, and Acceptability of Preoperative Weight Loss with a Liquid Very Low-Calorie Diet Before Bariatric Surgery in Real Practice

2018 ◽  
Vol 29 (1) ◽  
pp. 54-60 ◽  
Author(s):  
Kamthorn Yolsuriyanwong ◽  
Komdej Thanavachirasin ◽  
Kimberly Sasso ◽  
Lauren Zuro ◽  
Jessica Bartfield ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Preoperative Weight Loss ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Preoperative Weight ◽  
Real Practice

The effect of rate of weight loss on erythrocyte glutathione concentration and synthesis in healthy obese men

2002 ◽  
Vol 102 (5) ◽  
pp. 569-577 ◽  
Author(s):  
Peter FABER ◽  
Alexandra M. JOHNSTONE ◽  
Eileen R. GIBNEY ◽  
Marinos ELIA ◽  
R. James STUBBS ◽  
...  
Keyword(s):  
Weight Loss ◽  
Risk Factor ◽  
Oxidative Modification ◽  
Synthesis Rate ◽  
Rapid Weight Loss ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Obese Subjects

Obesity is commonly associated with a high incidence and prevalence of dyslipidaemia, cardiovascular disease and Type II diabetes. Interestingly, studies have also reported decreased antioxidant levels in obese subjects. This may constitute an independent risk factor in the pathogenesis of coronary artery disease as obese subjects would have a decreased capacity to prevent the oxidative modification of low-density lipoproteins, which is a mechanism suggested as central to the development of atherogenesis. As part of a study to investigate responses to weight loss, we have assessed the effects on GSH status of a decrease in body mass of 5%, either after 6 days of complete starvation or 11 days of a very low calorie diet (2.55MJ/day). There were significant differences between the two groups in the synthesis rate of erythrocyte GSH in response to weight loss. Both the fractional and the erythrocyte synthesis rate of GSH decreased significantly (P<0.01) in the starvation group by 22% and 16% respectively. In contrast, no change in synthesis rates was observed in the very low calorie diet group (P>0.05). Total erythrocyte concentration of GSH was unaffected by the weight loss within both groups. These results suggest that erythrocyte GSH synthesis is depressed in response to a very rapid weight loss induced by fasting. An acute reduction in GSH synthesis in response to a rapid weight loss may constitute a risk factor during periods of increased GSH demands.

scholarly journals Effect of a Very-Low-Calorie Ketogenic Diet on Circulating Myokine Levels Compared with the Effect of Bariatric Surgery or a Low-Calorie Diet in Patients with Obesity

Nutrients ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2368 ◽  
Author(s):  
Sajoux ◽  
Lorenzo ◽  
Gomez-Arbelaez ◽  
Zulet ◽  
Abete ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Body Composition ◽  
Muscle Mass ◽  
Statistical Significance ◽  
Nutritional Interventions ◽  
Low Calorie ◽  
Regulation Of Metabolism ◽  
Calorie Diet ◽  
Induced Changes

: The preservation of muscle mass and muscle function after weight loss therapy is currently a considerable challenge in the fight against obesity. Muscle mass secretes proteins called myokines that have relevant functions in the regulation of metabolism and health. This study was aimed to evaluate whether a very low-calorie ketogenic (VLCK) diet may modulate myokine levels, in addition to changes in body composition, compared to a standard, balanced low-calorie (LC) diet or bariatric surgery in patients with obesity. Body composition, ketosis, insulin sensitivity and myokines were evaluated in 79 patients with overweight/obesity after a therapy to lose weight with a VLCK diet, a LC diet or bariatric surgery. The follow-up was 6 months. The weight loss therapies induced changes in myokine levels in association with changes in body composition and biochemical parameters. The effects on circulating myokine levels compared to those at baseline were stronger after the VLCK diet than LC diet or bariatric surgery. Differences reached statistical significance for IL-8, MMP2 and irisin. In conclusion, nutritional interventions or bariatric surgery to lose weight induces changes in circulating myokine levels, being this effect potentially most notable after following a VLCK diet.

scholarly journals Protocol for a randomised controlled trial of the combined effects of the GLP-1 receptor agonist liraglutide and exercise on maintenance of weight loss and health after a very low-calorie diet

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e031431
Author(s):  
Simon Birk Kjær Jensen ◽  
Julie Rehné Lundgren ◽  
Charlotte Janus ◽  
Christian Rimer Juhl ◽  
Lisa Møller Olsen ◽  
...  
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Receptor Agonist ◽  
Controlled Trial ◽  
Good Clinical Practice ◽  
Study Groups ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet

IntroductionThe success rate of weight loss maintenance is limited. Therefore, the purpose of this study is to investigate the maintenance of weight loss and immunometabolic health outcomes after diet-induced weight loss followed by 1-year treatment with a glucagon-like peptide-1 receptor agonist (liraglutide), physical exercise or the combination of both treatments as compared with placebo in individuals with obesity.Methods and analysisThis is an investigator-initiated, randomised, placebo-controlled, parallel group trial. We will enrol expectedly 200 women and men (age 18–65 years) with obesity (body mass index 32–43 kg/m2) to adhere to a very low-calorie diet (800 kcal/day) for 8 weeks in order to lose at least 5% of body weight. Subsequently, participants will be randomised in a 1:1:1:1 ratio to one of four study groups for 52 weeks: (1) placebo, (2) exercise 150 min/week+placebo, (3) liraglutide 3.0 mg/day and (4) exercise 150 min/week+liraglutide 3.0 mg/day. The primary endpoint is change in body weight from randomisation to end-of-treatment.Ethics and disseminationThe trial has been approved by the ethical committee of the Capital Region of Denmark and the Danish Medicines Agency. The trial will be conducted in agreement with the Declaration of Helsinki and monitored to follow the guidelines for good clinical practice. Results will be submitted for publication in international peer-reviewed scientific journals.Trial registration number2015-005585-32

scholarly journals Changes in Whole-Body Amino Acid Metabolism in Response to 2 Weeks of the Very-Low Calorie Diet Are Not Affected by Gender

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1700-1700
Author(s):  
Agata Wierzchowska-McNew ◽  
Mariëlle Engelen ◽  
Kristopher Knoop ◽  
Gabriella Ten Have ◽  
John Thaden
Keyword(s):  
Weight Loss ◽  
Amino Acid ◽  
Acid Metabolism ◽  
Whole Body ◽  
Protein Breakdown ◽  
Restricted Diet ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet

Abstract Objectives Very Low-Calorie Diet (VLCD) is an approved method to safely achieve substantial short-term weight loss in obese patients. We previously reported that two weeks of the VLCD maintains whole-body protein and amino acid turnover despite a large reduction in lean body mass. Since the observed effects on body weight (BW) and composition differed between men and women, we hypothesized that the changes in amino acid metabolism in a response to the calorie-restricted diet is gender-specific. Methods 34 morbidly obese adults (BMI: 42 ± 0.9 kg/m2, 10 males and 24 females) underwent a VLCD for 2 weeks consisting of 820 kcal/day and 105-grams protein/day. Before the start of the VLCD (baseline), the whole-body production (WBP) rates of multiple amino acids involved in protein metabolism (e.g., glycine (GLY), glutamine (GLN), phenylalanine (PHE), tyrosine (TYR), and arginine (ARG)) were measured after IV pulse administration of their stable isotopes. Weight loss and body composition by dual-energy X-ray absorptiometry were assessed after 2 weeks of the VLCD. Baseline plasma enrichments were measured by LC-MS/MS. Data are presented as mean ± SE. Statistics are performed by Pearson correlation tests. Results The magnitude of the BW loss after 2 weeks of the VLCD differed between males and females (7.0 ± 0.7 kg vs. 4.1 ± 0.2 kg, P &lt; 0.0001, respectively) with a higher reduction in lean body mass observed in men than women (4.3 ± 0.8 kg vs. 2.7 ± 0.4 kg, P &lt; 0.05). Although, females had significantly reduced baseline WBP of ARG (7.3% vs. 2%, P = 0.0027), GLY (22.8% vs. 3.6%, P &lt; 0.001), and PHE (4.8% vs. 3.1%, P = 0.018) in comparison to men, two weeks of the VLCD had a comparable effect on multiple amino acid WBP in both genders. Suppressed contractile myofibrillar protein breakdown rate was observed in both groups (13% vs. baseline, P = 0.02) with no gender difference in net protein breakdown (PHE to TYR conversion rate). Hence, increased catabolism in men cannot be explained by a different response to the 2 weeks of a calorie-restricted diet. Conclusions Despite gender differences in body weight loss and changes in composition in response to a Very Low-Calorie Diet, changes in whole-body amino acid kinetics are not differently affected in men and women. Funding Sources CTRAL Internal Funds.

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