2.3.2. Study of RPG Dietary Fiber as Meal Preparations
pre-meal venous blood sample
Subjects were divided into four groups: blank control group (no extra supplements, C), standard control group (6 g pectin powder, Int0), RPG powder experimental group (6 g RPG powder, Powder), and RPG capsule experimental group (10 pieces of capsule with 5.6 g RPG in total, Cap). Ten minutes before the start of the meal on the experimental day, an antecubital vein needle (Jiangxi Huali Medical Equipment Co., Ltd., Xiajiang, China, YSGP/22G × 0.8 mm) was placed by a licensed nurse to collect a pre-meal venous blood sample by directly connecting the needle to the blood collection tube. After the meal, blood samples were taken every 30 min for up to 3.5 h using a disposable venous needle (Zhejiang Kandelai Medical Instrument Co., Ltd., Hangzhou, China, 21G 0.8 × 28 mm) connected to a blood collection tube. The blood samples collected were used to detect blood glucose, serum insulin, and the serum glucagon-like peptide-1 (GLP-1) index that reflects satiety. All twelve subjects completed the Appetite Assessment Questionnaires at different time points, as mentioned in 