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Effect of Increased Intake of Low Fat Dairy Products on Weight Loss and Insulin Resistance

This study has been completed.
Information provided by:
University of Calgary Identifier:
First received: November 26, 2007
Last updated: January 19, 2010
Last verified: January 2010
The purpose of this study is to determine if increased intake of low-fat milk products and calcium as part of a calorie restricted diet helps achieve a healthier body weight and body composition and decrease blood glucose levels in people with insulin resistance or type 2 diabetes.

Condition Intervention
Impaired Glucose Tolerance
Type 2 Diabetes
Metabolic Syndrome
Behavioral: High dairy and calcium intake
Behavioral: Usual intake

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Impact of High Milk Product and Calcium Intake During Weight Loss on Markers of Insulin Resistance

Resource links provided by NLM:

Further study details as provided by University of Calgary:

Primary Outcome Measures:
  • Weight loss [ Time Frame: 12 weeks ]

Secondary Outcome Measures:
  • Insulin and glucose response [ Time Frame: 12 weeks ]
  • Inflammatory Markers [ Time Frame: 12 weeks ]

Enrollment: 49
Study Start Date: October 2007
Study Completion Date: October 2009
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 2
High dairy intake and calcium supplement. High intake of low-fat milk product intake (3-4 servings per day) plus one 350 mg calcium supplement per day during 500 kcal/day deficit diet.
Behavioral: High dairy and calcium intake
High intake of low-fat milk product intake (3-4 servings per day) plus one 350 mg calcium supplement per day during 500 kcal/day deficit diet.
Other Name: Jamieson Mega Cal™ Chewable Calcium (350 mg) tablet
Placebo Comparator: 1
Usual diet of low dairy and calcium intake. Usual intake of low milk product intake (1 serving/day) and low calcium intake with a placebo during a 500 kcal/day deficit diet.
Behavioral: Usual intake
Usual intake of low milk product intake (1 serving/day) and low calcium intake with a placebo during a 500 kcal/day deficit diet

Detailed Description:
Obesity can cause many health problems as it is linked to several chronic diseases including type 2 diabetes. We know that individuals who are overweight or obese, and have impaired glucose tolerance or insulin resistance, have a good chance of developing type 2 diabetes. Research tells us that the risk of developing type 2 diabetes can be decreased by losing weight and making dietary changes. A promising area of study involves using low-fat milk products and calcium to prevent and/or control obesity and diabetes. This study is important because it will determine if including low-fat milk products in weight reducing diets can enhance weight loss, improve fat loss and decrease levels of blood glucose and insulin in individuals with impaired glucose tolerance or type 2 diabetes not treated with medication. This information is directly applicable to treating diseases such as obesity, type 2 diabetes and heart disease.

Ages Eligible for Study:   20 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Overweight and obese (BMI of 27 to 37 kg/m2)
  • Impaired glucose tolerance (fasting blood glucose >5.6 mmol/L) or
  • Type 2 diabetes treated with diet and exercise alone (no medications)
  • One or more of the following criteria for metabolic syndrome:

    1. Hypertriglyceridemia (> 1.70 mmol/L)
    2. Low high-density lipoprotein (HDL) cholesterol (< 1.04 mmol/L in men and < 1.30 mmol/L in women)
    3. High blood pressure (> 130/85 mm Hg)
    4. High waist circumference ( > 94 cm in men, > 80 cm in women)
  • Weight stable and no changes in exercise in past 3 months

Exclusion Criteria:

  • Type 1 diabetes
  • Type 2 diabetes treated with oral hypoglycemic agents or insulin
  • HbA1c > 8%
  • myocardial infarction or have undergone a cardiovascular intervention within the past three months
  • Subjects taking fibrate or statins who have had a dose change within the 8 weeks prior to randomization
  • Liver or pancreas disease
  • Major gastrointestinal surgeries
  • Pregnant or lactating
  • Exhibit alcohol or drug dependence
  • Taking drugs influencing appetite
  • Have a milk allergy or lactose intolerance
  • Following a diet or exercise regime designed for weight loss
  • Have a body weight greater than 350 lb (weight limit for DEXA instrument)
  • Chronic use of bulk laxatives, antacids or calcium supplements
  Contacts and Locations
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Please refer to this study by its identifier: NCT00564551

Canada, Alberta
Faculty of Kinesiology, Roger Jackson Centre for Health and Wellness Research
Calgary, Alberta, Canada, T2N 1N4
Sponsors and Collaborators
University of Calgary
Principal Investigator: Raylene A. Reimer, PhD, RD University of Calgary
  More Information

Responsible Party: Raylene Reimer, Associate Professor, University of Calgary Identifier: NCT00564551     History of Changes
Other Study ID Numbers: UC 21076
Study First Received: November 26, 2007
Last Updated: January 19, 2010

Keywords provided by University of Calgary:
Type 2 diabetes
Metabolic syndrome
Insulin resistance syndrome
Weight loss
Milk products

Additional relevant MeSH terms:
Diabetes Mellitus, Type 2
Metabolic Syndrome X
Insulin Resistance
Diabetes Mellitus
Glucose Metabolism Disorders
Metabolic Diseases
Weight Loss
Glucose Intolerance
Pathologic Processes
Endocrine System Diseases
Body Weight Changes
Body Weight
Signs and Symptoms
Calcium, Dietary
Hypoglycemic Agents
Physiological Effects of Drugs
Bone Density Conservation Agents processed this record on May 25, 2017