Comparison of Popular Weight Loss Diets

Not Recruiting

Trial ID: NCT00079573


This study will compare the safety and effectiveness of three popular weight loss plans. These plans will be compared with the USDA Dietary Guidelines.

Official Title

Benefits & Risks of Popular Weight Loss Diets

Stanford Investigator(s)


Inclusion Criteria

* Body mass index (BMI) between 27 and 40 kg/m2
* Weight stable for last 2 months
* Not actively on a weight loss plan
* No plans to move from the area over the next 2 years
* Willing to accept random assignment

Exclusion Criteria

* Pregnant or breastfeeding
* Within 6 months of giving birth or planning to become pregnant in the next 2 years
* Diabetes (type 1 or 2) or history of gestational diabetes
* Renal or liver disease, active neoplasms, or recent myocardial infarction
* Hyper- or hypothyroidism
* Lipid lowering medications or medications known to affect weight/energy expenditure
* Excessive alcohol intake (self-reported, \> 3 drinks/day)
* Postmenopausal, including surgical menopause
* Currently under psychiatric care or severely clinically depressed (\> 17 on Beck Inventory)


behavioral: Atkins diet (extremely low carbohydrate)

behavioral: Zone diet (low carbohydrate, high protein)

behavioral: Ornish diet (very low fat)

Not Recruiting

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305