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Completed

NCT Number: NCT02380846

The Metabolic Effects of Consuming Carbohydrate With Different Protein Types

This study aims to find out how consuming different proteins with rice affect metabolism. Most meals the investigators eat predominantly consist of a carbohydrate and protein (i.e. rice, noodles, bread etc with meats or seafood). However, it is still unknown how consuming different proteins with commonly eaten carbohydrates affect metabolism. Previous studies have shown that proteins stimulate hormones such as insulin, glucagon and gut hormones. However, the extent of the response depends on protein type. The metabolic responses to carbohydrates have also been shown to be greatly affected when they are eaten with proteins. However, most of the previous studies have used glucose as the carbohydrate and it is still unknown how eating proteins with carbohydrate foods such as rice affect metabolism. Therefore, this study has been initiated to determine the metabolic effects of eating different protein types with rice. Using the most common carbohydrate eaten in Asia (rice) and four commonly eaten protein foods (egg, chicken, fish and beancurd), this study aims to observe the metabolic effects of co-ingesting proteins and carbohydrate. The resulting data will provide valuable insights into the metabolic effects of protein-carbohydrate meals and will be useful in the development of practical advice and dietary guidelines for those with chronic diseases (such as diabetes and obesity).

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Key information

Conditions

Metabolic Diseases Nutritional and Metabolic Diseases

Age range

21 year–40 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

About this study

The study will recruit 20 healthy Chinese male subjects from the general public over a period of one year. The test foods will be rice, rice with egg, rice with fish, rice with chicken and rice with beancurd.Potential participants will have to come on one morning in an overnight fasted state for consenting and screening procedures. Only those fulfilling the inclusion and exclusion criteria will be admitted into the study. Each participant will be required to come on 5 non-consecutive days, with each session lasting approximately 4 hours. On each day, participants will arrive at the laboratory between 8-9 am following an overnight fast. An indwelling catheter will be inserted into a vein in their forearm or antecubital fossa and kept patent. Baseline blood samples will be obtained after which they will be given the test food to consume. Further blood samples will be taken at periodic intervals for the subsequent 3.5 hours. Blood samples will be taken every 15 minutes in the first 60 minutes and every 30 minutes for the remaining 150 minutes. At every time point blood samples will be extracted from a finger prick (for measuring glucose) and from the cannula (for measuring all other metabolites). At the same time points subjects will have to fill in visual analogue scales on feelings of hunger and satiety.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Chinese ethnicity
  • Male
  • Age between 21-40 years
  • Do not have any metabolic diseases (diabetes, hypertension etc)
  • Do not have G6PD deficiency
  • Not on prescription medication known to affect glucose related metabolism
  • Not allergic/intolerant to any of the test foods
  • Do not partake in sports at the competitive and/or endurance levels
  • Weight of at least 45kg
  • Body mass index between 18.0 to 24.9 kg/m2
  • Normal blood pressure (120/80 mmHg)
  • Fasting blood glucose <6.0 mmol/L

Treatment and study plan

White Rice

Other

Control - white rice

Rice with chicken breast

Other

Treatment 1 - steamed white rice with steamed chicken breast

Rice with fish

Other

Treatment 2 - steamed white rice with steamed fish

Rice with egg white

Other

Treatment 3 - steamed white rice with egg white

Rice with beancurd

Other

Treatment 4 - steamed white rice with steamed beancurd

Primary outcomes

  1. Blood glucose response (incremental area under the curve) measured using the hemocue

    Time frame: 3.5 hours post consumption

    Blood glucose response (incremental area under the curve) measured using the hemocue

  2. Insulin (incremental area under the curve) is determined using the COBAS

    Time frame: 3.5 hours post consumption

    Insulin (incremental area under the curve) is determined using the COBAS

  3. Glucagon determined using the ELISA

    Time frame: 3.5 hours post consumption

    Glucagon is determined using the ELISA

Secondary outcomes

  1. Effects of physical activity

    Time frame: Assessed at the start of every test session 1-2 weekly and up to 8 weeks in total per subject.

    Self-reported evaluation of physical activity according to a qualitative scale: light, medium or strenuous exercise done the day before the study visit.

  2. Satiety: Hunger and fullness measured using the Visual analogue scale

    Time frame: Assessed at the start of every test session 1-2 weekly and up to 8 weeks in total per subject.

    Hunger and fullness measured using the Visual Analogue Scale

Sponsors and collaborators

Lead sponsor

Singapore Institute of Food and Biotechnology Innovation

Other Gov

Registry information

Important dates

Study start
2013
Primary completion
2018
Study completion
2018
First posted
Mar 5, 2015
Registry last updated
May 15, 2019

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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