Eating Fast Has a Significant Impact on Glycemic Excursion in Healthy Women: Randomized Controlled Cross-Over Trial

• Main Authors: Yuuki Saito, Shizuo Kajiyama, Ayasa Nitta, Takashi Miyawaki, Shinya Matsumoto, Neiko Ozasa, Shintaro Kajiyama, Yoshitaka Hashimoto, Michiaki Fukui, Saeko Imai
• Format: Article
• Language: English
• Published: MDPI AG 2020-09-01
• Series: Nutrients
• Subjects: diet; eating speed; eating fast; glycemic excursion; postprandial glucose; flash glucose monitoring
• Online Access: https://www.mdpi.com/2072-6643/12/9/2767

Epidemiological studies have shown that self-reported fast eating increases the risk of diabetes and obesity. Our aim was to evaluate the acute effect of fast eating on glycemic parameters through conducting a randomized controlled cross-over study with young healthy women. Nineteen healthy women wore a flash glucose monitoring system for 6 days. Each participant consumed identical test meals with a different eating speed of fast eating (10 min) or slow eating (20 min) on the 4th or the 5th day. The daily glycemic parameters were compared between the 2 days. The mean amplitude of glycemic excursion (MAGE; fast eating 3.67 ± 0.31 vs. slow eating 2.67 ± 0.20 mmol/L, <i>p</i> < 0.01), incremental glucose peak (IGP; breakfast 2.30 ± 0.19 vs. 1.71 ± 0.12 mmol/L, <i>p</i> < 0.01, lunch 4.06 ± 0.33 vs. 3.13 ± 0.28 mmol/L, <i>p</i> < 0.01, dinner 3.87 ± 0.38 vs. 2.27 ± 0.27 mmol/L, <i>p</i> < 0.001), and incremental area under the curve for glucose of dinner 2 h (IAUC; 256 ± 30 vs. 128 ± 18 mmol/L × min, <i>p</i> < 0.001) for fast eating were all significantly higher than those for slow eating. The results suggest that fast eating is associated with higher glycemic excursion in healthy women.