Determination of Glycemic Index and Glycemic Load of Cereal Fiber Powder

Study on the Determination of Glycemic Index and Glycemic Load of Cereal Fiber Powder

This study choosed good health, aged 18 ~ 25, physical standard, the glucose tolerance test normal adults 12, oral glucose (reference) respectively in different periods, the valley of fiber powder upgrade formula, perfect meals, by extraction shu cereal bars, light appearance suits (by extraction shu compound dietary fiber powder, feeding combination 1:1) and 17 extraction enzyme 6 kinds of food, Venous blood was collected 15, 30, 45, 60, 90 and 120 min before and after oral administration respectively. Blood was collected for 7 times with 2mL each. The plasma is then separated to determine glucose levels. Blood glucose was measured within 3 h. With glucose as the reference, food glycemic index (GI) was calculated using the internationally used Wolever method. Time was taken as abscissa and blood glucose value at each time point was taken as ordinate to prepare the blood glucose response curve of each food tested after eating. The elevated glycemic area (AUC) under the glycemic curve was calculated geometrically, and the food GI and glycemic load (GL) values were calculated according to the following formula: GI value = (2 h post-meal blood glucose AUC of the tested food / 2 h post-meal glucose glucose AUC of the same amount of carbohydrate)×100, GL=GI*M(100g of the actual available carbohydrate of a food)/100.

Study Overview

• Status: Completed
• Conditions: Glycemic Index
• Intervention / Treatment: Dietary supplement: Cereal powder; Dietary supplement: Pure glucose powder

Detailed Description

(I) Glucose test: twelve subjects began to fast at 10 PM the previous day, and 2mL of venous blood was collected on an empty stomach in the morning of the next day, which was divided into sodium fluoride anticoagulant tubes for measuring glucose. Then 25 g of pure glucose powder was taken orally, and venous blood was taken at 15, 30, 45, 60, 90 and 120 min, respectively. A total of 7 blood samples were collected, and 2mL of blood was collected each time. Then the plasma was separated to determine the content of glucose, and the blood glucose was measured within 3 h. In this study, venous indwelling needle was used to collect blood, which can reduce repeated venous aspiration. About 2 mL of normal saline was left in the indwelling needle to prevent blood clotting. Blood collection by an experienced nurse in charge or supervising nurse.

(II) Glucose response test of tested foods: Glucose test was conducted on the first day, and different tested foods (see Table 2 and Table 3) were tested on the third, sixth or ninth day respectively, with an interval of 2-3 days or more between the two foods. Specific dates were arranged according to the test schedule. Twelve subjects fasted after 10:00 PM the previous day, and 2mL of venous blood was taken on an empty stomach in the morning of the next day. They ate the tested food (containing about 25g or 10g carbohydrates, as shown in Table 2 and 3) on different dates respectively. The eating methods were as follows: The upgraded sample of grain fiber powder formula was washed and adjusted with 1:8 times of warm water at 60-70℃, stirred for about 2min and turned into a slightly thickened state, then put it at the palatability temperature and drink it. The perfect nutrition meal is rinsed with 1:6 times hot water at about 70℃, stirred evenly for about 1min, and then put it to the palatability temperature for drinking; Zhen Shu cereal bar pastry ready to eat in open bag; The nutritious meal + compound dietary fiber powder (good mixing according to the ratio of 1:1) is rinsed at 1:6 times in hot water around 70℃, stirred evenly for about 1min, and then put it to the palatability temperature for drinking; 17 light drink ferment drink directly after opening the bag. Venous blood was taken at 15, 30, 45, 60, 90 and 120 minutes, and blood glucose was measured within 3 hours. The blood collection method is the same as the above glucose test.

(3) Determination of plasma glucose: hexokinase method, with Beckman 5800 series automatic biochemical analyzer and its reagent determination.

(4) Calculation of food GI: With glucose as the reference (GI=100), the internationally used Wolever method was used to calculate food GI, with time as abscissa and blood sugar value at each time point as ordinate Postprandial glucose response curve. The elevated glucose area (AUC) under the glucose curve was calculated geometrically, and the food GI and GL values were calculated according to the following formula: GI value = (2 h post-meal blood glucose AUC of the tested food / 2 h post-meal glucose glucose AUC of the same amount of carbohydrate)×100, GL=GI*M(100g of the actual available carbohydrate of a food)/100.

(5) Quality control: (1) Formulate unified operation implementation methods and evaluation standards to standardize the operation; (2) Laboratory inspection requirements: unified methods, instruments and reagents; ③ Draw blood by experienced nurse in charge to ensure that the drawing time and indwelling needle meet the requirements; (4) Statistical processing and analysis methods of data were determined and implemented by statistical experts. Blood glucose quality control charts were drawn. Unified maximum allowable line and warning limit values were set according to the target value, and the measurement results should be within the warning line. ⑤ Set up inspectors to supervise the quality of each special work; ⑥ This study was in compliance with ethical standards, approved by the Ethics Committee of Sun Yat-sen Memorial Hospital of Sun Yat-sen University for filing, and informed consent signed by participating patients.

(VI) Data processing: The internationally used Wolever method was used to calculate the food GI. Using time as the abscissa and blood glucose values at each time point as the ordinate, the post-meal glucose response curves of the tested food were prepared and GI and GL were calculated.

• Study Type: Interventional
• Enrollment (Actual): 12
• Phase: Not Applicable

Contacts and Locations

Study Locations

• China
  • Guangdong
    • Guangzhou, Guangdong, China, 510030
      • Sun Yat-sen Memorial Hospital, Sun Yat-sen University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 25 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Healthy, normal glucose tolerance test, normal blood pressure, no family history of diabetes or other metabolic history;
• Aged between 18 and 25;
• Normal body weight and waist circumference, body mass index (BMI) between 18.5 and 23.9kg/m2;
• No carbohydrate intolerance.

Exclusion Criteria:

• Those with abnormal glucose tolerance, overweight or obese, or lactose or carbohydrate intolerance were excluded.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Diagnostic
• Allocation: Non-Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Cereal fiber powder	Dietary supplement: Cereal powder; Eat or drink oral glucose (reference) the valley of fiber powder upgrade formula, perfect meals, by extraction shu cereal bars, light appearance suits (by extraction shu compound dietary fiber powder, feeding combination 1:1) and 17 extraction enzyme 6 kinds of food respectively in different periods.; Other Names: perfect meals; 17 extraction enzyme
Placebo Comparator: Pure glucose powder	Dietary supplement: Pure glucose powder; Pure glucose powder

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Blood glucose	Venous blood was collected up to 120 min	Blood glucose was measured within 3 hours.

Collaborators and Investigators

• Sponsor: Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
• Investigators: Principal Investigator: Chen C gang, Master, Sun Yat-sen Memorial Hospital，Sun Yat-sen University

Publications and helpful links

General Publications

• Jenkins DJ, Wolever TM, Taylor RH, Barker H, Fielden H, Baldwin JM, Bowling AC, Newman HC, Jenkins AL, Goff DV. Glycemic index of foods: a physiological basis for carbohydrate exchange. Am J Clin Nutr. 1981 Mar;34(3):362-6. doi: 10.1093/ajcn/34.3.362.
• Vrolix R, Mensink RP. Variability of the glycemic response to single food products in healthy subjects. Contemp Clin Trials. 2010 Jan;31(1):5-11. doi: 10.1016/j.cct.2009.08.001. Epub 2009 Sep 6.
• Barclay AW, Petocz P, McMillan-Price J, Flood VM, Prvan T, Mitchell P, Brand-Miller JC. Glycemic index, glycemic load, and chronic disease risk--a meta-analysis of observational studies. Am J Clin Nutr. 2008 Mar;87(3):627-37. doi: 10.1093/ajcn/87.3.627.

Study record dates

Study Major Dates

• Study Start (Actual): April 1, 2021
• Primary Completion (Actual): November 10, 2021
• Study Completion (Actual): November 10, 2021

Study Registration Dates

• First Submitted: November 22, 2021
• First Submitted That Met QC Criteria: December 2, 2021
• First Posted (Actual): December 3, 2021

Study Record Updates

• Last Update Posted (Actual): December 3, 2021
• Last Update Submitted That Met QC Criteria: December 2, 2021
• Last Verified: November 1, 2021

More Information

Terms related to this study

• Keywords: Glycemic Index; Glycemic Load
• Other Study ID Numbers: SYSEC-KY-KS-2020-203

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No