scholarly journals Long-term Effects of a Very Low-Carbohydrate Diet and a Low-Fat Diet on Mood and Cognitive Function

2009 ◽  
Vol 169 (20) ◽  
pp. 1873 ◽  
Author(s):  
Grant D. Brinkworth
Keyword(s):  
Cognitive Function ◽  
Long Term Effects ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate

Abstract P165: The Long-term Effect of a Low-Carbohydrate Diet on Endothelial Dysfunction and Insulin Resistance: A Randomized Controlled Trial

Circulation ◽  
2013 ◽  
Vol 127 (suppl_12) ◽  
Author(s):  
Tian Hu ◽  
Kristi Reynolds ◽  
Lu Yao ◽  
Calynn Bunol ◽  
Yanxi Liu ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Endothelial Dysfunction ◽  
Adhesion Molecule ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate ◽  
Study Participants

The long-term effects of low-carbohydrate diets versus low-fat diets on endothelial dysfunction and insulin resistance are unclear. A total of 148 study participants with a body mass index of 30 - 45 kg/m2 (Mean: 35.4 kg/m2) who were free of diabetes, cardiovascular diseases and kidney disease were recruited. The participants were randomly assigned to either a low-carbohydrate diet (<40 g/day; N=75) or a low fat (<30% energy from fat, <10% from saturated fat; N=73) diet. Two 24-hour dietary recalls were conducted at each clinic visit (0, 3, 6 and 12 months of intervention). Participants met with a study dietitian weekly for the first month followed by group settings bi-weekly for 5 months and monthly for the last 6 months. Each group was provided the same behavioral curriculum related to diet emphasizing portion control and eating habits. Biomarkers for endothelial function and insulin resistance included E-selectin, Intercellular Adhesion Molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), Insulin-like growth Factor-1 (IGF-1), serum insulin, and glucose. Mixed-effect regression models including group, time and their interaction were used to analyze the data. Of the study participants, 60 in the low-fat group (81.1%) and 59 in the low-carbohydrate group (79.7%) completed the entire intervention. The mean age was 46.8 years, 88.5% were women and 55.1% were African-Americans. The low-carbohydrate group lost approximately 3.5 kg more body weight than did the low-fat group (P= 0.002) on average. Compared to the low-fat diet, the low-carbohydrate diet resulted in greater reductions in E-selectin (net change: -4.5, -4.3, and -3.8 ng/mL at 3, 6, and 12 months, respectively; overall P= 0.002) and ICAM-1 (net change: -7.3, -10.4, and -16.8 ng/mL at 3, 6, and 12 months, respectively; overall P= 0.06). There was no significant change in any other markers. Our findings suggest that the low-carbohydrate is at least as effective as the low-fat diet at improving endothelial dysfunction and insulin resistance.

scholarly journals Long-term effects of a very-low-carbohydrate weight loss diet compared with an isocaloric low-fat diet after 12 mo

2009 ◽  
Vol 90 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Grant D Brinkworth ◽  
Manny Noakes ◽  
Jonathan D Buckley ◽  
Jennifer B Keogh ◽  
Peter M Clifton
Keyword(s):  
Weight Loss ◽  
Long Term Effects ◽  
Low Fat ◽  
Weight Loss Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate

Weight loss leads to reductions in inflammatory biomarkers after a very-low-carbohydrate diet and a low-fat diet in overweight men

2004 ◽  
Vol 107 (4) ◽  
pp. 365-369 ◽  
Author(s):  
Matthew J. SHARMAN ◽  
Jeff S. VOLEK
Keyword(s):  
Weight Loss ◽  
Body Mass ◽  
High Sensitivity ◽  
Inflammatory Biomarkers ◽  
Low Grade ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate

In recent years, it has become apparent that low-grade vascular inflammation plays a key role in all stages of the pathogenesis of atherosclerosis. Weight loss has been shown to improve blood inflammatory markers; however, it is unknown if weight-loss diets varying in macronutrient composition differentially affect inflammatory responses. The primary purpose of the present study was to compare a very-low-carbohydrate diet and a low-fat weight-loss diet on inflammatory biomarkers in overweight men. In a randomized cross-over design, 15 overweight men (body fat, >25%; body mass index, 34 kg/m2) consumed two experimental weight-loss diets for two consecutive 6-week periods: a very-low-carbohydrate diet (<10% energy via carbohydrate) and a low-fat diet (<30% energy via fat). Both the low-fat and the very-low-carbohydrate diets resulted in significant decreases in absolute concentrations of hsTNF-α (high-sensitivity tumour necrosis factor-α), hsIL-6 (high-sensitivity interleukin-6), hsCRP (high-sensitivity C-reactive protein) and sICAM-1 (soluble intercellular cell-adhesion molecule-1). There was no significant change in absolute sP-selectin (soluble P-selectin) concentrations after either diet. Normalized inflammatory values represented as the delta change per 1 kg reduction in body mass showed a significant difference between the two diets only for sP-selectin (P<0.05). In summary, energy-restricted low-fat and very-low-carbohydrate diets both significantly decreased several biomarkers of inflammation. These data suggest that, in the short-term, weight loss is primarily the driving force underlying the reductions in most of the inflammatory biomarkers.

Abstract P167: The Long-term Effect of a Low-Carbohydrate Diet on Appetite Hormones: A Randomized Controlled Trial

Circulation ◽  
2013 ◽  
Vol 127 (suppl_12) ◽  
Author(s):  
Tian Hu ◽  
Kristi Reynolds ◽  
Lu Yao ◽  
Calynn Bunol ◽  
Yanxi Liu ◽  
...  
Keyword(s):  
Peptide Yy ◽  
Controlled Trial ◽  
P Value ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Carbohydrate ◽  
Total Ghrelin ◽  
Study Participants

The long-term effects of low-carbohydrate diets on hormones related to appetite are unclear. We recruited a total of 148 study participants with a body mass index of 30 - 45 kg/m2 (Mean: 35.4 kg/m2) who were free of diabetes, cardiovascular diseases and kidney disease. The participants were randomly assigned to either a low-carbohydrate diet (<40 g/day; N=75) or a low fat (<30% energy from fat, <10% from saturated fat; N=73) diet. Two 24-hour dietary recalls were conducted at each clinic visit (0, 3, 6 and 12 months of the intervention). Participants met with a study dietitian weekly for the first month followed by group settings bi-weekly for 5 months then monthly for the subsequent 6 months. Each group was provided the same behavioral curriculum related to diet emphasizing portion control and eating habits. Total ghrelin and peptide YY were determined using radioimmunoassay methods. Of the study participants, 60 in the low-fat group (81.1%) and 59 in the low-carbohydrate group (79.7%) completed the entire intervention. The mean age was 46.8 years, 88.5% were women and 55.1% were African-Americans. The low-carbohydrate group lost approximately 3.5 kg more body weight than did the low-fat group (P value: 0.002) over the course of the intervention. Both diets decreased total peptide YY and ghrelin. Compared to low-fat diets, the low-carbohydrate diet resulted in a significantly greater decrease in total peptide YY at 6 (Net change: -6.8 ph/mL; P value: 0.04) and 12 months (Net change: -10.6 ph/mL; P value: 0.02). The changes in total ghrelin were not significantly different throughout the study. Our findings suggest that the low-carbohydrate diet did not result in a greater loss of appetite, compared to the low-fat diet.

scholarly journals A Randomized Trial of a Low-Carbohydrate Diet vs Orlistat Plus a Low-Fat Diet for Weight Loss

2010 ◽  
Vol 170 (2) ◽  
pp. 136 ◽  
Author(s):  
William S. Yancy ◽  
Eric C. Westman ◽  
Jennifer R. McDuffie ◽  
Steven C. Grambow ◽  
Amy S. Jeffreys ◽  
...  
Keyword(s):  
Weight Loss ◽  
Randomized Trial ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate

scholarly journals Effect of weight loss by a low-fat diet and a low-carbohydrate diet on peptide YY levels

2010 ◽  
Vol 34 (8) ◽  
pp. 1239-1242 ◽  
Author(s):  
P A Essah ◽  
J R Levy ◽  
S N Sistrun ◽  
S M Kelly ◽  
J E Nestler
Keyword(s):  
Weight Loss ◽  
Peptide Yy ◽  
Low Fat ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Low Fat Diet ◽  
Low Carbohydrate
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