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Multi-cycle Prolon Diet

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02158897
Recruitment Status : Completed
First Posted : June 9, 2014
Last Update Posted : April 6, 2017
Information provided by (Responsible Party):
Min Wei, University of Southern California

Brief Summary:
Evidence from bio-gerontology research from our laboratory and others have showed that short-term fasting/starvation (STS) can improve the efficacy of chemotherapy by protecting normal cells and tissues and potentially sensitizing malignant cells to chemo drugs. Furthermore, STS improves risk factors associated with aging and age-related disease in rodent models. Prolonged fasting, however, is difficult to implement and may not be feasible or safe in humans. We have developed a fasting-mimicking diet (FMD) that was well accepted in a pilot human trial. The objective of the study is to ascertain the impact of the fasting-mimicking diet given to adult subjects for 5 days a month for 3 consecutive months. The investigators hypothesize that the specially designed dietary regimen can reduce the risk factors for metabolic syndrome and biomarkers associated with aging and age-related diseases.

Condition or disease Intervention/treatment Phase
Healthy Volunteers Other: Prolon diet Phase 1 Phase 2

Detailed Description:

The Phase I part of the study is designed as a randomized cross-over trial, including two arms: a Control arm and a multi-cycle special 5-day dietary regimen (Diet, 3 cycles) arm. After 3 cycles, the Control and Diet groups are crossed over such that the Control group will under-go dieting and the Diet group will return to normal diet. Participants will be monitored for body weight and physiological changes, as well as the adherence to the dietary intervention.

The Phase II part of the study is an expansion of the Phase I to ascertain the impact of the dietary intervention on risk factors for metabolic syndrome and biomarkers associated with aging and age-related diseases.

Statistical methods: Paired samples t-test and Mann-Whitney test will be used to compare between Control and Diet groups as well as pre- and post-diet values.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 102 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Effect of a Periodic Fasting-mimicking Diet on Risk Factors for Metabolic Syndrome and Age-related Diseases
Study Start Date : March 2013
Actual Primary Completion Date : June 2016
Actual Study Completion Date : June 2016

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
No Intervention: Control
Participants will consume their normal diet. Body weight and physiological change at two time points (approximately 2-3 months apart) will be examined. The participants will be crossed over to the diet group.
Experimental: Prolon Diet
Participants will be provided with a 5-day supply of fasting-mimicking diet, including energy bars, soups, drink packets and dietary supplements. Participants will diet for 3 cycles. Each one-month cycle consists of 5 days of dieting with a calorie intake estimated at 600-1200 calories per day. The rest of the month participants will eat normally. After 3 cycles, participants will be examined again after consuming their normal diet after 2-3 months.
Other: Prolon diet
3 cycles of a 5-day Prolon diet very month
Other Name: Fasting-mimicking diet

Primary Outcome Measures :
  1. Safety and feasibility of the Prolon diet [ Time Frame: 1 and half years ]
    Phase I: To obtain preliminary estimates of the feasibility and safety of a low calorie Prolon diet in adult subjects.

  2. Effect of Prolon diet on risk factors for metabolic syndrome and biomarkers of aging [ Time Frame: 2 and half years ]
    Phase II: To ascertain the impact of the calorie restricted special diet on the risk factors for metabolic syndrome and biomarkers associated with aging and age-related diseases: e.g. fasting glucose, glucose tolerance, blood pressure, abdominal obesity, lipid profile, circulating IGF-1 and IGFBP1.

Secondary Outcome Measures :
  1. Changes in cognitive functions before and after the dietary intervention. [ Time Frame: 2 and half years ]

    Effects of dieting on the brain using fMRI;

    Effects of dieting on cognitive functions:

    1. Verbal memory and learning;
    2. Speed of processing/attention;
    3. Working memory;
    4. Executive function;
    5. Visuospatial construction and memory;
    6. Frequency of Forgetting;

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Generally healthy adults
  • BMI >19 kg/m^2

Exclusion Criteria:

  • Severe hypertension (systolic BP > 200 mm Hg and/or diastolic BP > 105 mm Hg).
  • Underweight (BMI < 19 kg/m^2)
  • Females who are pregnant or nursing
  • Special dietary requirements incompatible with the study interventions
  • Significant food allergies which would make the subject unable to consume the study food
  • Alcohol dependency (alcohol intake greater than two drinks per day for women and three drinks per day for men).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02158897

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United States, California
Davis School of Gerontology
Los Angeles, California, United States, 90089
Sponsors and Collaborators
University of Southern California
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Responsible Party: Min Wei, Research assistant professor, University of Southern California Identifier: NCT02158897    
Other Study ID Numbers: HS-12-00391
First Posted: June 9, 2014    Key Record Dates
Last Update Posted: April 6, 2017
Last Verified: April 2017