- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04955691
Metabolic Changes Induced by a Very Low Carbohydrate Diet in Youth With Type 1 Diabetes
Metabolic and Neurological Changes Induced by a Very Low Carbohydrate Diet in Youth With Type 1 Diabetes
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The primary objective of this randomized crossover study is to determine whether a very low carbohydrate diet improves glycemic changes (measured by continuous glucose monitors) when compared to a standard carbohydrate diet in youth with type 1 diabetes.
The secondary objectives of the study are to compare metabolic changes after 2 weeks on each diet using the 2-step hyperinsulinemic euglycemic-hypoglycemic clamp and stable isotope infusions. The euglycemic portion of the clamp will allow us to determine the hepatic glucose production and adipose tissue lipolysis. Secondary objectives also include measuring the neurohormonal response to hypoglycemia after 2 weeks on each diet.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Laura M Nally, M.D.
- Phone Number: 203-785-5831
- Email: laura.nally@yale.edu
Study Contact Backup
- Name: Carol Alexandrescu, M.S.
- Phone Number: 203-785-7022
- Email: carol.alexandrescu@yale.edu
Study Locations
-
-
Connecticut
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New Haven, Connecticut, United States, 06511
- Recruiting
- Yale-New Haven Hospital
-
Contact:
- Laura Nally, MD
- Phone Number: 203-785-5831
- Email: laura.nally@yale.edu
-
Contact:
- Amy Steffen
- Phone Number: 203-737-8852
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Diagnosis of type 1 diabetes for at least 1 year
- Hemoglobin A1c level < 10% within the past 2 months
- Provision of signed and dated informed consent form by the adult (if person is at least 18 years old) or parent and assent form if the participant is <18 years old.
- Stated willingness to comply with all study procedures and availability for the duration of the study
- Male, female, transgender, nonbinary are all eligible
- Diagnosis of type 1 diabetes for at least 1 year
- Insulin pump use for at least 2 months.
- Ability to perform daily blood ketone checks, wear a continuous glucose monitor, willing to wear an activity monitor, willing to adhere to the study diets and keep a diet journal.
- For females of reproductive potential: use of highly effective contraception for at least 1 month prior to screening and agreement to use such a method during study participation and for an additional 4 weeks after the end of the dietary intervention.
- For males of reproductive potential: use of condoms or other methods to ensure effective contraception with partner
Exclusion Criteria:
- Current use of glucose-lowering agents other than insulin
- Unstable psychiatric disorders, including eating disorders
- Weight loss medications within the last 6 months
- Pregnancy or lactation, or planning pregnancy within the next 6 months
- BMI < 19 kg/m2 for individuals 18 years of age or older
- BMI < 5%ile for individuals under 18 years
- Weight less than 49 kg or 108 pounds
- Other medical conditions that may interfere with glucose metabolism and insulin sensitivity
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: low carbohydrate diet
In this crossover study, participants will be randomized to either a low or standard carbohydrate for 2 weeks.
Participants in the low carbohydrate group will limit carbohydrate intake to 15% of total daily calories.
|
Participants will engage in a diet that limits carbohydrate intake to 15% of total daily calories for 2 weeks.
|
Active Comparator: standard carbohydrate diet
In this crossover study, participants will be randomized to either a low or standard carbohydrate for 2 weeks.
Participants in the standard carbohydrate group will follow an ad libitum diet with standard carbohydrate intake.
|
Participants will engage in a diet that recommends standard carbohydrate intake with respect to total daily calories for 2 weeks.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Time in the optimal glucose range
Time Frame: 2 weeks
|
Time in the optimal glucose range will be operationally defined as the percent time spent in the target range of 70-180 mg/dL during 2 weeks the diet.
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2 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Time spent with hypoglycemia.
Time Frame: 2 weeks
|
Time spent with hypoglycemia will be operationally defined as the percent time spent in the hypoglycemic (<54 mg/dL, <70 mg/dL) ranges during 2 weeks of diet.
|
2 weeks
|
Time spent with hyperglycemia
Time Frame: 2 weeks
|
Time spent with hyperglycemia will be operationally defined as the percent time spent in the hyperglycemic (>180 mg/dL, >250 mg/dL) ranges during 2 weeks of diet.
|
2 weeks
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Human Factors
Time Frame: 8 weeeks
|
To describe how participants feel about and react to following a very low carbohydrate diet, interviews will be conducted.
Data will be coded and emerging patterns will be combined into descriptive themes.
|
8 weeeks
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2000029479
- 1K23DK128560-01 (U.S. NIH Grant/Contract)
- 2P30DK045735-26 (U.S. NIH Grant/Contract)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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