Classic vs. High-Fat Intermittent Fasting Effects

July 19, 2024 updated by: Emre Batuhan Kenger, Istanbul Bilgi University

Classic vs. High-Fat Intermittent Fasting: Impacts on Body Composition, Eating Behavior, and Diet Satisfaction

Poor eating habits contribute to weight gain and obesity, leading to numerous metabolic issues such as diabetes and cardiovascular diseases. The treatment of obesity involves lifestyle interventions that include dietary and nutritional modifications, physical activity, and behavioral therapy. Literature supports both carbohydrate and fat restriction in the treatment of obesity. In low-carbohydrate diets, less than 40% of energy is sourced from carbohydrates.Besides the dietary model, individual eating behavior can also influence the diet's outcomes. There is a significant relationship between eating behavior and food choices. Given that food choices can impact diet satisfaction, evaluating eating behavior is important when assessing dietary compliance.The literature includes studies demonstrating the effects of a classic intermittent fasting diet. However, no studies have compared the potential effects of intermittent fasting models based on the macronutrient distribution within their content. Therefore, this study aims to evaluate the effects of high-fat, low-carbohydrate intermittent fasting versus classical intermittent fasting on body composition, eating behavior, and diet satisfaction.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

44

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Turkey
      • Istanbul, Turkey, 41400
        • Gebze Municipality Family Counseling Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • 18-65 years old
  • no chronic disease
  • female
  • volunteering

Exclusion Criteria:

  • hypoglycemia
  • eating disorders
  • pregnant and lactating women

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Classic IF diet
The 16:8 intermittent fasting model, 45-60% carbohydrates, 10-15% protein, and 25-30% fat dietary model applied.
Other: Diet therapy for Classic IF diet group
The 16:8 intermittent fasting model was applied for six weeks. Time restrictions were tailored to fit the participants' lifestyles, with feeding times set between 10:00-12:00 and 18:00-20:00 for all participants. The classic intermittent fasting diet was planned with a macronutrient distribution of 45-60% carbohydrates, 10-15% protein, and 25-30% fat. Additionally, total energy intake was reduced by 500-750 kcal.
Experimental: Low carb-High fat IF diet
The 16:8 intermittent fasting model, 10-30% carbohydrates and 50-65% fat dietary model applied.
Other: Diet therapy for low carb-High fat IF diet group
The 16:8 intermittent fasting model was applied for six weeks. Time restrictions were tailored to fit the participants' lifestyles, with feeding times set between 10:00-12:00 and 18:00-20:00 for all participants.The low carb-high fat intermittent fasting diet included 10-30% carbohydrates and 50-65% fat.Additionally, total energy intake was reduced by 500-750 kcal.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Body composition
Time Frame: six weeks
measurements of total body weight
six weeks
Body composition
Time Frame: six weeks
measurements of body mass index (BMI)
six weeks
Body composition
Time Frame: six weeks
measurements of fat mass
six weeks
Body composition
Time Frame: six weeks
measurements of muscle mass
six weeks
Body composition
Time Frame: six weeks
measurements of fat percentage
six weeks
diet satisfaction
Time Frame: six weeks
A number of questions are necessary for clinicians to evaluate their patients' or clients' diet satisfaction, as well as their compliance with the diet, based on their responses. The Diet Satisfaction Scale is designed to assess satisfaction with various aspects of any diet, such as hunger levels, desire to eat, food preparation, enjoyment, ease of adherence at home and away, food variety, budget compatibility, contribution to physical health, and sustainability. The scale was developed by Jospe et al, and its Turkish validity and reliability were established by Eskici and Yilmaz. It consists of 9 items with 5-point Likert-type response options ranging from 1 (strongly disagree) to 5 (strongly agree). Notably, the first item is reverse-scored (1=5, 2=4, 3=3, 4=2, and 5=1).
six weeks
behavioral and cognitive components of eating
Time Frame: six weeks
The Three-Factor Eating Scale, used to measure the behavioral and cognitive components of eating, was developed by Cappelleri and colleagues. Its validity and reliability in Turkish were established by Karakus et al. The questionnaire comprises three factors: Uncontrolled Eating (UE), Cognitive Restraint (CR), and Emotional Eating (EE). Uncontrolled Eating (UE) refers to losing control over eating due to hunger or external stimuli and includes 9 items, with scores ranging from 9 to 36. Cognitive Restraint (CR) refers to the conscious restriction of food intake to control body shape and weight, encompassing 6 items, with scores ranging from 6 to 24. Emotional Eating (EE) examines overeating in response to negative emotional states such as anger, sadness, or stress, and includes 6 items, with scores ranging from 6 to 24. A higher score in any sub-factor indicates a greater dominance of the corresponding eating behavior.
six weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Istanbul Bilgi University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 1, 2024

Primary Completion (Actual)

April 1, 2024

Study Completion (Actual)

May 15, 2024

Study Registration Dates

First Submitted

July 16, 2024

First Submitted That Met QC Criteria

July 19, 2024

First Posted (Actual)

July 23, 2024

Study Record Updates

Last Update Posted (Actual)

July 23, 2024

Last Update Submitted That Met QC Criteria

July 19, 2024

Last Verified

July 1, 2024

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • IFLOWCARB

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

Individual participant data will be shared if requested by the authors.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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.

Subscribe