Comparison of Low Fat and Low Carbohydrate Diets With Respect to Weight Loss and Metabolic Effects (B-SMART)
July 27, 2012 updated by: Prof. Dr. Jens Jordan, Hannover Medical School
Randomized Parallel Group Comparison on the Influence of a Low Carbohydrate and a Low Fat Hypocaloric 6 Months Diet on Body Weight Reduction, Metabolic and Cardiovascular Variables in Obese Healthy Women and Men.
The investigators will test the hypothesis that a LOW CARB hypocaloric diet will reduce body weight over six months more than a LOW FAT hypocaloric diet.
In addition to body weight, the investigators will measure cardiovascular and metabolic variables and will take blood samples in order to determine whether certain metabolites may predict the diet success.
Study Overview
Study Type
Interventional
Enrollment (Actual)
170
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Berlin, Germany, 13125
- Experimental & Clinical Research Center
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 60 years (Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Body Mass Index > 27 kg/m2
- No chronic medication (except oral contraceptives and L-Thyroxine) or possibility to stop medication for study duration
- Able to give written informed consent
Exclusion Criteria:
- Pregnancy and nursing
- Severe cardiovascular, liver, kidney, hepatic or orthopedic disease that need treatment
- Metabolic or endocrine disease that need treatment
- Hypertension blood pressure > 160/95 mmHg or need of > 2 drugs
- Previous stroke or cerebral ischemia
- Significant neurologic or psychiatric disease
- Any kind of eating disorder
- Bariatric surgery in the past
- Drug or alcohol abuse
- Any cancer in the past
- Acute and chronic infections
- Metallic implants (e.g. pace makers) or conditions that do not allow MRI scans
- Body weight > 130 kg
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
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Active Comparator: low fat hypocaloric diet
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dietary counseling, group teaching
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Active Comparator: Low carbohydrate hypocaloric diet
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dietary counseling, group teaching
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
|---|---|
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Body weight reduction
Time Frame: Month 6
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Month 6
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
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Weight maintenance
Time Frame: Month 12 - 36
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follow up assesement after 6 months diet
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Month 12 - 36
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Reduction of visceral adipose tissue mass
Time Frame: Month 6
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Month 6
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Reduction of left ventricular mass
Time Frame: Month 6
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Month 6
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Influence on energy expenditure and fat oxidation rates
Time Frame: Month 6
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Month 6
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Jens Jordan, MD, Hannover Medical School
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
General Publications
- Haufe S, Engeli S, Kaminski J, Witt H, Rein D, Kamlage B, Utz W, Fuhrmann JC, Haas V, Mahler A, Schulz-Menger J, Luft FC, Boschmann M, Jordan J. Branched-chain amino acid catabolism rather than amino acids plasma concentrations is associated with diet-induced changes in insulin resistance in overweight to obese individuals. Nutr Metab Cardiovasc Dis. 2017 Oct;27(10):858-864. doi: 10.1016/j.numecd.2017.07.001. Epub 2017 Jul 11.
- Haufe S, Haas V, Utz W, Birkenfeld AL, Jeran S, Bohnke J, Mahler A, Luft FC, Schulz-Menger J, Boschmann M, Jordan J, Engeli S. Long-lasting improvements in liver fat and metabolism despite body weight regain after dietary weight loss. Diabetes Care. 2013 Nov;36(11):3786-92. doi: 10.2337/dc13-0102. Epub 2013 Aug 20.
- Engeli S, Utz W, Haufe S, Lamounier-Zepter V, Pofahl M, Traber J, Janke J, Luft FC, Boschmann M, Schulz-Menger J, Jordan J. Fatty acid binding protein 4 predicts left ventricular mass and longitudinal function in overweight and obese women. Heart. 2013 Jul;99(13):944-8. doi: 10.1136/heartjnl-2013-303735. Epub 2013 Apr 18.
- Utz W, Engeli S, Haufe S, Kast P, Bohnke J, Haas V, Hermsdorf M, Wiesner S, Pofahl M, Traber J, Luft FC, Boschmann M, Jordan J, Schulz-Menger J. Moderate dietary weight loss reduces myocardial steatosis in obese and overweight women. Int J Cardiol. 2013 Aug 10;167(3):905-9. doi: 10.1016/j.ijcard.2012.03.104. Epub 2012 Apr 10.
- Haufe S, Utz W, Engeli S, Kast P, Bohnke J, Pofahl M, Traber J, Haas V, Hermsdorf M, Mahler A, Busjahn A, Wiesner S, Otto C, Mehling H, Luft FC, Boschmann M, Schulz-Menger J, Jordan J. Left ventricular mass and function with reduced-fat or reduced-carbohydrate hypocaloric diets in overweight and obese subjects. Hypertension. 2012 Jan;59(1):70-5. doi: 10.1161/HYPERTENSIONAHA.111.178616. Epub 2011 Nov 7.
- Utz W, Engeli S, Haufe S, Kast P, Hermsdorf M, Wiesner S, Pofahl M, Traber J, Luft FC, Boschmann M, Schulz-Menger J, Jordan J. Myocardial steatosis, cardiac remodelling and fitness in insulin-sensitive and insulin-resistant obese women. Heart. 2011 Oct;97(19):1585-9. doi: 10.1136/hrt.2011.224451. Epub 2011 Jul 20.
- Haufe S, Engeli S, Kast P, Bohnke J, Utz W, Haas V, Hermsdorf M, Mahler A, Wiesner S, Birkenfeld AL, Sell H, Otto C, Mehling H, Luft FC, Eckel J, Schulz-Menger J, Boschmann M, Jordan J. Randomized comparison of reduced fat and reduced carbohydrate hypocaloric diets on intrahepatic fat in overweight and obese human subjects. Hepatology. 2011 May;53(5):1504-14. doi: 10.1002/hep.24242. Epub 2011 Mar 11.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
April 1, 2007
Primary Completion (Actual)
December 1, 2011
Study Completion (Actual)
July 1, 2012
Study Registration Dates
First Submitted
August 10, 2009
First Submitted That Met QC Criteria
August 10, 2009
First Posted (Estimate)
August 11, 2009
Study Record Updates
Last Update Posted (Estimate)
July 30, 2012
Last Update Submitted That Met QC Criteria
July 27, 2012
Last Verified
July 1, 2012
More Information
Terms related to this study
Other Study ID Numbers
- B-SMART
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