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Comparison of Medifast's 5 & 1 Plan to a Food-based Plan of Equal Calories

Information source: Medifast, Inc.
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Obesity

Intervention: Medifast 5 & 1 Plan for weight loss and weight maintenance (Other); Food-based diet plan for weight loss and weight maintenance (Other)

Phase: N/A

Status: Completed

Sponsored by: Medifast, Inc.

Official(s) and/or principal investigator(s):
Lisa M Davis, PhD, PA-C, Principal Investigator, Affiliation: Medifast, Inc.


Portion-controlled meal replacements have been shown to be an effective weight control strategy in overweight and obese individuals. Thus, the investigators plan to evaluate the effect of Medifast's 5 & 1 program compared to an food-based diet plan of equal calories on the following indices: weight loss and maintenance of weight loss, satiety during weight loss, changes in biochemical markers of inflammation and oxidative stress following weight loss, and compliance and retention rates.

Clinical Details

Official title: Efficacy of Medifast's 5 & 1 Program Compared to a Food-based Diet After a Period of Weight Loss and Weight Maintenance

Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Primary outcome: Weight change (in kilograms) from week 0

Secondary outcome:

Satiety using a visual analog scale

Change in Inflammation represented by C-reactive protein

Change in Oxidative Stress represented by urine lipid peroxides

Blood Pressure change

Change in Pulse

Maintenance of weight lost during the 16 week weight loss phase expressed as weight regained from week 16 to week 40 (in kilograms)

Change in percent body fat (a measure representing a change in body composition)

Change in Blood lipids

Change in lean muscle mass (a measure representing change in body composition)

Change in Waist circumference (a measure representing change in body composition)

Change in Visceral Fat Rating (a measure representing change in body composition)


Minimum age: 18 Years. Maximum age: 65 Years. Gender(s): Both.


Inclusion Criteria:

- Adult males and females (age between 18 and 65)

- Obese (BMI >=30. 0 kg/m2 and <50. 0 kg/m2)

- Non-smokers

- No known food allergies to wheat, gluten, soy or nuts

- <14 alcoholic beverages per week

- Willing and able to give informed consent

- Not currently using appetite-affecting medications (e. g SSRIs, steroids, Ritalin)

- Not pregnant or lactating

- Primary care physician's permission for weight loss, normal labs and

electrocardiogram (EKG) within past 1 year Exclusion Criteria:

- Actively dieting

- Eating Attitudes Test (EAT) > 30

- Chronic uncontrolled health problems (not including obesity or diabetes)

- Pacemaker or other internal electronic medical device

- Schizophrenia, history of bipolar disorder, current Major Depressive Disorder

- Dependence on alcohol or sedative-hypnotic drugs (e. g. benzodiazepines)

- Cognitive impairment severe enough to preclude informed consent

- Taking weight loss or appetite-suppressant medications

- Taking appetite affecting medications (e. g. SSRIs, steroids, Ritalin)

- Food allergies to wheat, gluten, soy, or nuts

- Pregnant or lactating

Locations and Contacts

Medifast, Inc., Owings Mills, Maryland 21117, United States
Additional Information

Related publications:

Thearle M, Aronne LJ. Obesity and pharmacologic therapy. Endocrinol Metab Clin North Am. 2003 Dec;32(4):1005-24. Review.

Hedley AA, Ogden CL, Johnson CL, Carroll MD, Curtin LR, Flegal KM. Prevalence of overweight and obesity among US children, adolescents, and adults, 1999-2002. JAMA. 2004 Jun 16;291(23):2847-50.

Gale SM, Castracane VD, Mantzoros CS. Energy homeostasis, obesity and eating disorders: recent advances in endocrinology. J Nutr. 2004 Feb;134(2):295-8. Review.

de Ferranti S, Rifai N. C-reactive protein and cardiovascular disease: a review of risk prediction and interventions. Clin Chim Acta. 2002 Mar;317(1-2):1-15. Review.

Festi D, Colecchia A, Sacco T, Bondi M, Roda E, Marchesini G. Hepatic steatosis in obese patients: clinical aspects and prognostic significance. Obes Rev. 2004 Feb;5(1):27-42. Review.

Abbott RD, Ross GW, White LR, Nelson JS, Masaki KH, Tanner CM, Curb JD, Blanchette PL, Popper JS, Petrovitch H. Midlife adiposity and the future risk of Parkinson's disease. Neurology. 2002 Oct 8;59(7):1051-7.

Heymsfield SB, van Mierlo CA, van der Knaap HC, Heo M, Frier HI. Weight management using a meal replacement strategy: meta and pooling analysis from six studies. Int J Obes Relat Metab Disord. 2003 May;27(5):537-49.

Visser M, Bouter LM, McQuillan GM, Wener MH, Harris TB. Elevated C-reactive protein levels in overweight and obese adults. JAMA. 1999 Dec 8;282(22):2131-5.

Yudkin JS, Stehouwer CD, Emeis JJ, Coppack SW. C-reactive protein in healthy subjects: associations with obesity, insulin resistance, and endothelial dysfunction: a potential role for cytokines originating from adipose tissue? Arterioscler Thromb Vasc Biol. 1999 Apr;19(4):972-8.

Tchernof A, Nolan A, Sites CK, Ades PA, Poehlman ET. Weight loss reduces C-reactive protein levels in obese postmenopausal women. Circulation. 2002 Feb 5;105(5):564-9.

Furukawa S, Fujita T, Shimabukuro M, Iwaki M, Yamada Y, Nakajima Y, Nakayama O, Makishima M, Matsuda M, Shimomura I. Increased oxidative stress in obesity and its impact on metabolic syndrome. J Clin Invest. 2004 Dec;114(12):1752-61.

Stefanović A, Kotur-Stevuljević J, Spasić S, Bogavac-Stanojević N, Bujisić N. The influence of obesity on the oxidative stress status and the concentration of leptin in type 2 diabetes mellitus patients. Diabetes Res Clin Pract. 2008 Jan;79(1):156-63. Epub 2007 Sep 11.

Vincent HK, Morgan JW, Vincent KR. Obesity exacerbates oxidative stress levels after acute exercise. Med Sci Sports Exerc. 2004 May;36(5):772-9.

Ashley JM, Herzog H, Clodfelter S, Bovee V, Schrage J, Pritsos C. Nutrient adequacy during weight loss interventions: a randomized study in women comparing the dietary intake in a meal replacement group with a traditional food group. Nutr J. 2007 Jun 25;6:12.

Ditschuneit HH, Flechtner-Mors M. Value of structured meals for weight management: risk factors and long-term weight maintenance. Obes Res. 2001 Nov;9 Suppl 4:284S-289S.

Egger GJ. Are meal replacements an effective clinical tool for weight loss?--a clarification. Med J Aust. 2006 Jun 5;184(11):591.

Ball SD, Keller KR, Moyer-Mileur LJ, Ding YW, Donaldson D, Jackson WD. Prolongation of satiety after low versus moderately high glycemic index meals in obese adolescents. Pediatrics. 2003 Mar;111(3):488-94.

Starting date: March 2008
Last updated: November 10, 2009

Page last updated: August 23, 2015

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