Clinical trial NCT02355795: Diets With a Spectrum of Fat Intake for Preventing Obesity: A Randomized Controlled-feeding Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Healthy
Keywords: weight change
diet
dietary fat
feeding design
Lead sponsor: Zhejiang University
Sponsor class: OTHER
Collaborators: name: National Basic Research Program, China
name: National Natural Science Foundation of China
name: Chinese PLA General Hospital
First posted: 2015-02-04
Enrollment: 307
Sex: ALL
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The aim of the current study is to evaluate the effects of diets with three levels of dietary fat on weight change and related cardiometabolic risk factors in a 6-month randomized controlled-feeding trial.


Eligibility criteria: Inclusion criteria:

* Students in Zhejiang University or working stuff in the Chinese PLA General Hospital
* 18 ≤ age ≤ 35
* Body Mass Index \< 28\*
* Are willing to eat all of the study foods even when full
* Are willing to eat only foods provided
* Are willing to avoid strenuous activity during the 6-mo intervention Exclusion criteria：
* Systolic blood pressure ≥ 140 mmHg or diastolic blood pressure ≥ 90 mmHg
* Total cholesterol ≥ 239 mg/dL
* Low-density lipoprotein cholesterol ≥ 159 mg/dL
* Triglycerides ≥ 199 mg/dL
* Blood glucose ≥ 110 mg/dL
* Change in body weight exceeding ± 10% during the prior year
* Energy intake is too low or too high
* Unwillingness or special requirement for diet that could not be modified
* Poor adherence during the recruiting meeting or unsatisfactory completion of keeping food diary or filling questionnaire at any time before randomization
* Eating disorder or any psychosocial or scheduling factors that could impede study outcomes
* Have a history of diagnosed CVD, diabetes, cancer or inflammatory diseases
* Have a history of a mental illness
* Have diagnosed endocrine, pulmonary or hematological disease
* Have diagnosed bowel disease or malabsorption that would prevent the participants from complying with the dietary restrictions of the feeding trial
* Renal or liver insufficiency
* Other chronic disease thought to interfere with the effect of the diet or with participation or adherence
* Current use of supplements or anti-inflammation medications or medications affecting glucose, lipid metabolism and blood pressure
* Smoking or alcoholic beverage intake \>1 times per week
* Current or planned pregnancy prior to end of study, or breast-feeding
* Irregular menstrual cycles
* Have birth control medication

Primary outcomes:
measure: body weight in kilograms as measured by a calibrated scale
timeFrame: 0,1,2,3,4,5,and 6 months
Secondary outcomes:
measure: waist circumference as measured by an anthropometric measuring tape
timeFrame: 0,1,2,3,4,5,and 6 months
measure: blood pressure as measured by a validated automated sphygmomanometer
timeFrame: 0,1,2,3,4,5,and 6 months
measure: fasting blood lipids as measured by a clinical chemistry analyzer
timeFrame: 0,1,2,3,4,5,and 6 months
measure: fasting glucose, insulin, glycated serum protein as measured by an immunology analyzer
timeFrame: 0,1,2,3,4,5,and 6 months
measure: adiponectin, leptin as measured by ELISA kits
timeFrame: 0,1,2,3,4,5,and 6 months
Other outcomes:
Locations:
city: Hangzhou
country: China
facility: Zhejiang University
state: Zhejiang
Study officials:
References:
citation: Wan Y, Yuan J, Li J, Li H, Zhang J, Tang J, Ni Y, Huang T, Wang F, Zhao F, Li D. Unconjugated and secondary bile acid profiles in response to higher-fat, lower-carbohydrate diet and associated with related gut microbiota: A 6-month randomized controlled-feeding trial. Clin Nutr. 2020 Feb;39(2):395-404. doi: 10.1016/j.clnu.2019.02.037. Epub 2019 Feb 27.
citation: Wan Y, Wang F, Yuan J, Li J, Jiang D, Zhang J, Li H, Wang R, Tang J, Huang T, Zheng J, Sinclair AJ, Mann J, Li D. Effects of dietary fat on gut microbiota and faecal metabolites, and their relationship with cardiometabolic risk factors: a 6-month randomised controlled-feeding trial. Gut. 2019 Aug;68(8):1417-1429. doi: 10.1136/gutjnl-2018-317609. Epub 2019 Feb 19.
citation: Wan Y, Wang F, Yuan J, Li J, Jiang D, Zhang J, Huang T, Zheng J, Mann J, Li D. Effects of Macronutrient Distribution on Weight and Related Cardiometabolic Profile in Healthy Non-Obese Chinese: A 6-month, Randomized Controlled-Feeding Trial. EBioMedicine. 2017 Aug;22:200-207. doi: 10.1016/j.ebiom.2017.06.017. Epub 2017 Jun 20.