Determination of Glycemic Index and Glycemic Load of Cereal Fiber Powder
Condition: Glycemic Index
Study type: Interventional

Summary: 
      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.
    

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.
    

Intervention name(s): Cereal powder; Pure glucose powder
Intervention type(s): Dietary Supplement; Dietary Supplement
Intervention description(s): 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.; Pure glucose powder
Other intervention name(s): perfect meals; 17 extraction enzyme
Allocation: Non-Randomized
Intervention model: Crossover Assignment
Masking: None (Open Label)
Primary purpose: Diagnostic
Keywords: Glycemic Index; Glycemic Load