Web-based Weight Loss Intervention
Public ClinicalTrials.gov record NCT03400696. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Excess weight is a major risk factor underlying leading causes of death globally, including cardiovascular disease, type 2 diabetes, and some cancers. Among participants assigned to the same lifestyle intervention arms in prior weight loss randomized controlled trials, large inter-individual differences in weight loss success have been observed, ranging from \>50lbs of weight loss to \>10lbs of weight gain. Both genetic and non-genetic factors underlying differential adherence and weight loss success are poorly understood.
Study identification
- NCT ID
- NCT03400696
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 63,656 participants
Conditions and interventions
Conditions
Interventions
- Lower carbohydrate diet Behavioral
- Higher fiber diet Behavioral
- Physical activity focused Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 18 Years to 70 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Dec 27, 2017 (Actual)
- Primary completion
- Jan 8, 2019 (Actual)
- Completion
- Apr 16, 2019 (Actual)
- Last update posted
- Jun 4, 2020
2017 – 2019
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| 23andMe | Mountain View | California | 94041 | — |
| 23andMe | Mountain View | California | 94043 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT03400696, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jun 4, 2020 · Synced Oct 18, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT03400696 live on ClinicalTrials.gov.