OverweightProteinRichNCT01634048
The Effect of Protein-enriched Diet on Body Composition and Appetite
A study testing High Protein, low calorie meal replacement in people with Overweight and Obese, run by Imperial College London at 1 site in United Kingdom.
Trial summary
Obesity is a major problem worldwide and current dietary interventions are not proving to be enough to cease the increase in levels of obesity and its detrimental side effects, such as nonalcoholic fatty liver disease (NAFLD). Read more about this study
- Who is it for?
- Ages 25 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Overweight, Obese, Metabolic Syndrome
- What is being tested?
- High Protein, low calorie meal replacement
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 39 participants
- Where
- 1 siteUnited Kingdom
- Study dates
- Jul 2012to May 2015
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 25 to 70 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Overweight and obese people as classified by BMI 27-35kg/ m2 (inclusive)
- A Finnish Diabetes Risk Score (FINDRISC) >8 [22]
- Waist circumference measurement of ≥102cm in males or ≥88cm in females
- Assessed as appropriate for inclusion, based on a prestudy screening (see section 3.4)
- Willingness and ability to give written informed consent and willingness and ability to understand, to participate and to comply with the study requirements
Who cannot join
- Claustrophobia
- Pacemaker, metal implant, clips, implanted device, shrapnel or bullets, metal in eyes that precludes magnetic resonance imaging
- Treatment with any medication that might affect the study outcome (e.g., medication that is affecting appetite regulation and/or blood flow)
- Current pregnancy or breast feeding
- Delivery within the last year
- Bariatric surgery
Show all 17Show fewer
- History of any disease with unknown outcome
- Significant intercurrent disease or history of clinically significant disease of any type, in particular liver, kidney, or heart disease, any form of diabetes mellitus or psychiatric illness (including Depression as defined by BDIII score above 28)
- History of cancer, excluding skin cancer
- History of severe or multiple allergies, severe adverse drug reaction or leucopenia
- Smokers
- Regular drinkers of more than three units of alcohol daily (1 unit = 300 ml beer, 1 glass wine, 1 measure spirit)
- Subjects who have had a fluctuation of body weight >5% in the 3 months prior to entering into the study
- History of, or current evidence of, abuse of alcohol or any drug substance, licit or illicit
- Regular intake of overthecounter (OTC) medication (other than the occasional paracetamol/aspirin)
- Poor compliers or subjects unlikely to attend
- Blood donation within the 12 week period before the initial study dose
Trial locations and contacts
1 site in 1 country.
About this study
Obesity is a major problem worldwide and current dietary interventions are not proving to be enough to cease the increase in levels of obesity and its detrimental side effects, such as nonalcoholic fatty liver disease (NAFLD).
Existing data suggests that adjustments in the macronutrient composition of the diet, more specifically the protein content, may have beneficial effects on body composition and an antiobesegenic effect on appetite. This may be important in terms of controlling body weight and reducing the amount of fatty tissue within our bodies and organs, and therefore preventing obesity and its health related side effects.
Read more
The investigators will perform a study to investigate whether a high protein low energy diet compared to a normal protein low energy diet, in overweight adults can modify appetite and aid loss of weight and fat mass. Subjects will receive either a high protein low energy diet (1.34g protein/kg body weight) or a normal protein low energy diet (0.8g protein/kg body weight) in the form of 2 meal replacements and one conventional meal per day with 2 snacks for 12 weeks.
HYPOTHESIS In overweight subjects with the metabolic syndrome, a 12 week dietary intervention with a high protein low energy diet will lead to a reduced appetite, body weight and fat mass, more specifically to a greater fall in levels of fat in the liver and pancreas than a low energy normal protein diet.
- Being tested
- High Protein, low calorie meal replacement
- Keywords
- high protein diet, meal replacements, low calorie diet, intra hepatocellular lipid
- Medical subject headings
- Overweight, Obesity, Metabolic Syndrome, Non-alcoholic Fatty Liver Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
High Protein, low calorie meal replacementDietary supplement
The high protein group will have meal replacements with added protein powder (to achieve 1.34g protein/kg body weight) and the control group will have standard meal replacements (0.8g protein/kg body weight). Meal replacements have been used in hundreds of previous human studies and are generally not found to be linked to any serious adverse effects.
| Study group | Role | What they receive |
|---|---|---|
| High protein low calorie meal replacements | Experimental | Meal replacements with added protein powder(1.34g pro/kg). Receives: Dietary Supplement: High Protein, low calorie meal replacement |
| Normal protein, low calorie meal replacement group | Sham comparator | The control group will have standard meal replacements (0.8g protein/kg body weight). Receives: Dietary Supplement: High Protein, low calorie meal replacement |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Lipid Content of the Liver (Intrahepatocellular Lipid)
Changes in body weight and body composition, more specifically visceral, muscle, liver and pancreas fat content will be measured using magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS). Individual's data will be compared at baseline and at 12 weeks of following the diet and also to that of the participants given normal protein low energy diets. This data may therefore support our hypothesis that high protein intakes may help to aid weight loss and reduce fat mass and would therefore be a viable option in the treatment of obesity.
Measured: Change from Baseline at 12 weeks
Secondary outcomes (1)
Change in Appetite Regulation, Measured by VAS and Food Intake.
It has also been suggested that highprotein diets are more beneficial in the regulation of appetite. We therefore aim to measure any changes in appetite whilst on a highprotein lowenergy diet compared to a normalprotein lowenergy diet. Changes in appetite will be measured using validated questionnaires assessing subjects feeling of hunger, pleasantness and volume able to eat as well as fullness. This data may support our hypothesis that highprotein intakes may alter appetite regulation and therefore be a useful in the treatment of obesity.
Measured: Baseline and 12 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jul 2012 (estimated)
- Study startJul 2012
- Primary completionMay 2015
- Study completionMay 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for OverweightStudies of the same condition, open and under way.
- More trials run by Imperial College LondonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 39 participants (actual)
Sponsor and investigators
- Lead sponsor
- Imperial College London
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Gary Frost, Principal investigator, Imperial College London
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01634048
- Sponsor's protocol ID
- 12/LO/0592
- Acronym
- ProteinRich
- Status last verified
- Apr 2022
- First submitted
- 2 Jul 2012
- Last updated
- 28 Apr 2022
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 28 Apr 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Protein-enriched Diet on Body Composition and Appetite
- ClinicalTrials.gov ID
- NCT01634048
- Acronym / sponsor ID
- ProteinRich / 12/LO/0592
- Keywords
- high protein diet, meal replacements, low calorie diet, intra hepatocellular lipid
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 39 participants (actual)
- Lead sponsor
- Imperial College LondonUniversity, hospital or other
- Study start
- Jul 2012
- Primary completion
- May 2015 (actual)
- Study completion
- May 2015 (actual)
- First posted
- 6 Jul 2012 (estimated)
- Results
- Posted 12 Oct 2021
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Obesity is a major problem worldwide and current dietary interventions are not proving to be enough to cease the increase in levels of obesity and its detrimental side effects, such as nonalcoholic fatty liver disease (NAFLD).
Existing data suggests that adjustments in the macronutrient composition of the diet, more specifically the protein content, may have beneficial effects on body composition and an antiobesegenic effect on appetite. This may be important in terms of controlling body weight and reducing the amount of fatty tissue within our bodies and organs, and therefore preventing obesity and its health related side effects.
The investigators will perform a study to investigate whether a high protein low energy diet compared to a normal protein low energy diet, in overweight adults can modify appetite and aid loss of weight and fat mass. Subjects will receive either a high protein low energy diet (1.34g protein/kg body weight) or a normal protein low energy diet (0.8g protein/kg body weight) in the form of 2 meal replacements and one conventional meal per day with 2 snacks for 12 weeks.
HYPOTHESIS In overweight subjects with the metabolic syndrome, a 12 week dietary intervention with a high protein low energy diet will lead to a reduced appetite, body weight and fat mass, more specifically to a greater fall in levels of fat in the liver and pancreas than a low energy normal protein diet.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind (participant, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| High protein low calorie meal replacements | Experimental | Dietary Supplement: High Protein, low calorie meal replacementMeal replacements with added protein powder(1.34g pro/kg). |
| Normal protein, low calorie meal replacement group | Sham comparator | Dietary Supplement: High Protein, low calorie meal replacementThe control group will have standard meal replacements (0.8g protein/kg body weight). |
Who may qualify
- Ages
- 25 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Overweight and obese people as classified by BMI 27-35kg/ m2 (inclusive)
- A Finnish Diabetes Risk Score (FINDRISC) >8 [22]
- Waist circumference measurement of ≥102cm in males or ≥88cm in females
- Assessed as appropriate for inclusion, based on a prestudy screening (see section 3.4)
- Willingness and ability to give written informed consent and willingness and ability to understand, to participate and to comply with the study requirements
Key exclusion criteria (17 listed)
- Claustrophobia
- Pacemaker, metal implant, clips, implanted device, shrapnel or bullets, metal in eyes that precludes magnetic resonance imaging
- Treatment with any medication that might affect the study outcome (e.g., medication that is affecting appetite regulation and/or blood flow)
- Current pregnancy or breast feeding
- Delivery within the last year
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| High Protein, low calorie meal replacementThe high protein group will have meal replacements with added protein powder (to achieve 1.34g protein/kg body weight) and the control group will have standard meal replacements (0.8g protein/kg body weight). Meal replacements have been used in hundreds of previous human studies and are generally not found to be linked to any serious adverse effects. | Dietary supplement | High protein low calorie meal replacements, Normal protein, low calorie meal replacement group |
Primary outcome
Change in Lipid Content of the Liver (Intrahepatocellular Lipid)
Time frame: Change from Baseline at 12 weeks
Changes in body weight and body composition, more specifically visceral, muscle, liver and pancreas fat content will be measured using magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS). Individual's data will be compared at baseline and at 12 weeks of following the diet and also to that of the participants given normal protein low energy diets. This data may therefore support our hypothesis that high protein intakes may help to aid weight loss and reduce fat mass and would therefore be a viable option in the treatment of obesity.
1 secondary outcome
Change in Appetite Regulation, Measured by VAS and Food Intake.
Time frame: Baseline and 12 weeks
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Apr 2022.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Gary Frost principal investigator
Imperial College London
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing High Protein, low calorie meal replacement in people with Overweight and Obese, run by Imperial College London at 1 site in United Kingdom.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 17 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Apr 2022. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 12 Oct 2021). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Lipid Content of the Liver (Intrahepatocellular Lipid) (time frame: Change from Baseline at 12 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Apr 2022.