Abstract
Green tea is known worldwide for its beneficial effects on human health. However, objective data evaluating this influence in humans is scarce. The aim of the study was to assess the impact of green tea extract (GTE) on starch digestion and absorption. The study comprised of 28 healthy volunteers, aged 19 to 28 years. In all subjects, a starch 13C breath test was performed twice. Subjects randomly ingested naturally 13C-abundant cornflakes during the GTE test (GTE 4 g) or placebo test. The cumulative percentage dose recovery (CPDR) was significantly lower for the GTE test than for the placebo test (median [interquartile range]: 11.4% [5.5–15.5] vs. 16.1% [12.7–19.5]; p = 0.003). Likewise, CPDR expressed per hour was considerably lower in each point of the measurement. In conclusion, a single dose of green tea extract taken with a test meal decreases starch digestion and absorption.
Highlights
Blood glucose and have anti-diabetic effects[9,10,11,12]
In most subjects (78.6%), the decreased starch digestion and absorption due to green tea extract (GTE) was rapid and the aforesaid effect persisted until the last measure
The obtained data show that a single dose of GTE ingested with the test meal may limit the digestion and absorption of dietary starch in humans
Summary
Blood glucose and have anti-diabetic effects[9,10,11,12]. EGCG is associated with anti-obesity activity, and anti-bacterial, anti-viral, and anti-cancer effects[5,14]. The effect of green tea extract (GTE) on starch digestion and absorption is widely discussed. Data evaluating this influence in humans are scarce. Isotope breath tests prove to be useful as a non-invasive method assessing breakdown of carbohydrates[15]. The aim of this study was to assess the impact of GTE on starch digestion and absorption with the use of a breath test in humans
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