The Effectiveness of Commercial Weight Loss Programmes

This study has been completed.
British Broadcasting Corporation
Information provided by:
University of Surrey Identifier:
First received: May 17, 2006
Last updated: July 20, 2006
Last verified: May 2003

The objective is to compare the effectiveness of 4 different commercial weight-loss diets available to adults in the UK.

This is achieved with a 6 month multi-centre randomised unblinded controlled trial of

  • Dr Atkins' New Diet Revolution,
  • The slimFast Plan,
  • The weight Watchers Pure Points Programme,
  • Rosemary Conley's "Eat Yourself Slim" Diet & Fitness Plan.
  • No diet (control)

Subjects are a community based sample of 300 (60 per group) otherwise healthy overweight and obese adults.

Main outcome measures are weight and body fat change over 6 months.

Condition Intervention
Behavioral: calorie controlled diet

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Official Title: A Randomised Control Trial of Commercial Weight Loss Programme in a Community Based Sample of Obese Adults.

Resource links provided by NLM:

Further study details as provided by University of Surrey:

Primary Outcome Measures:
  • Weight loss
  • Fat loss

Estimated Enrollment: 300
Study Start Date: July 2002
Estimated Study Completion Date: March 2003

Ages Eligible for Study:   18 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Body mass index (BMI) > 27 and < 40 kg/m2.

Exclusion Criteria:

  • History of coronary heart disease
  • Type 1 or Type 2 diabetes
  • Renal, liver or respiratory failure
  • Gout
  • Taking lipid lowering or anti-hypertensive drugs
  • History of obesity with known cause (i.e. Cushings disease, hypothyroidism)
  • Previous gastric or weight loss surgery
  • Taking any weight loss drug (including Orlistat or Sibutramine)
  • Clinical depression
  • Eating disorders
  • Drug or alcohol abuse
  • Any malabsorptive state (including lactose intolerance)
  • Being treated for a malignancy
  • Being pregnant
  • Breastfeeding
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Please refer to this study by its identifier: NCT00327821

United Kingdom
University of Surrey
Guildford, Surrey, United Kingdom, GU2 7XH
Sponsors and Collaborators
University of Surrey
British Broadcasting Corporation
Principal Investigator: D J Millward, PhD University of Surrey
Study Director: H A Truby, PhD SRD University of Surrey