Measuring the Glycemic Index and Tracking Metabolites of New and Emerging Lentil Varieties
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 10
- 试验地点
- 1
- 主要终点
- Glycemic Response
研究概览
简要总结
It is not known whether different lentil varieties have the same efficacy in lowering blood glucose. Similarly, the carbohydrate component of lentils responsible for lowering blood glucose is not known, nor is the bioavailability of lentil metabolites and polyphenol bioactive.
详细描述
The overall aim of this work is to produce credible evidence for substantiating a food health claim for post prandial blood glucose lowering by lentil. Although several studies have shown that lentil consumption results in a lowering of post prandial blood glucose, it is not known whether different lentil varieties have the same efficacy. Similarly, the carbohydrate component of lentils responsible for lowering blood glucose is not known, nor is the bioavailability of lentil metabolites and polyphenol bioactive. The investigators hypothesize that the slowly digestible starch content of lentil is inversely related to in vivo glycemic response. The specific aims of this study are: (i) to identify the putative component(s) in lentil that might account for its blood glucose lowering effect, and (ii) to identify differences in blood glucose reduction among lentil varieties. These aims will be achieved in a three-step process. Firstly, in vitro studies will be pursued to determine the carbohydrate fractions of 20 new and emerging Canadian lentil varieties. Secondly, these results will be used to choose 8 lentil varieties with different slowly digestible starch content for a human Glycemic Index study. Thirdly, identification of lentil metabolites will be achieved by collecting extra capillary blood (200uL)and urine samples at fasting and 120min for measurement of polyphenols and metabolites using established HPLC and metabolomics techniques.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Male or non-pregnant females, 18-75 years of age, inclusive
- •Body mass index (BMI) < 40 kg/m²
- •Willing to maintain habitual diet, physical activity pattern, and body weight throughout the trial and to refrain from smoking for 12hr prior to each visit.
- •Normal fasting serum glucose (<7.0mmol/L capillary corresponding to whole blood glucose <6.3mmol/L).
- •Understanding the study procedures and willing to provide informed consent to participate in the study and authorization to release relevant protected health information to the study investigator.
排除标准
- •Failure to meet any one of the inclusion criteria
- •Known history of AIDS, hepatitis, diabetes or a heart condition
- •Subjects using medications or with any condition which might, in the opinion of Dr. Wolever, the Medical Director of GI Labs, either: 1) make participation dangerous to the subject or to others, or 2) affect the results.
- •Major trauma or surgical event within 3 months of screening.
- •Unwillingness or inability to comply with the experimental procedures and to follow GI Labs safety guidelines.
- •Known intolerance, sensitivity or allergy to any ingredients in the study products.
研究组 & 干预措施
Lentil Variety
Each participant will consume a serving of one of eight lentil varieties (Greenland; Improve; Impower; Imigreen; Asterix; Redberry; Redcliff; Redbow) containing 25g available carbohydrate at separate study visits
干预措施: Lentil Variety (Other)
White Bread
Each participant will consume a serving of white bread containing 25g available carbohydrate on two separate visits
干预措施: White Bread (Other)
结局指标
主要结局
Glycemic Response
时间窗: 120 minutes after consuming each test or control food
Incremental blood glucose response after eating the test or control foods will be measured over a period of 120 minutes using finger prick blood samples collected at time 0, 15, 30, 45, 60, 90, 120 minutes.
次要结局
- Lentil metabolites in blood and urine(Urine and additional 200uL blood samples will be collected before eating test meal and at 120 minutes after.)
研究者
Dan Ramdath
Research Scientist
Guelph Food Research Centre