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The Glycemic Index Research Unit (GIRU) has trail-blazed into the foray of assessing the quality of carbohydrates in local Asian foods - a first in Asia. This is the first and only facility accredited by Singapore Accreditation Council (SAC)) to conduct Glycemic Index (GI) testing and research using Singaporeans as human subjects to develop a local GI database. 

GIRU has been in the forefront of both in vivo and in vitro GI testing and strives to support the needs of the industry through offering a suite of consultancy services in low GI product development and testing to Small & Medium Enterprises (SMEs) and Multinational Corporations (MNCs). For over a decade, GIRU has been providing a range of clinical nutrition research services in addition to GI testing.


In 2017, the GIRU team received the Innergy award from the Ministry of Education (MOE) for our innovation efforts. 

What is Glycemic Index?

Glycemic Index (GI) is the ranking of carbohydrate foods from 0 to 100 according to their effect on blood sugar (glucose) levels.

What are the benefits of low GI foods?


A low GI diet causes a gradual rise in blood sugar levels that has shown to:


  • improve blood glucose control
  • prevent and manage diabetes
  • increase satiety and reduce appetite
  • facilitate weight loss
  • improve blood lipid profiles
  • possibly improve acne (preliminary studies)
  • enhance sport performance and endurance
  • reduce risks of diabetes, coronary heart diseases (CHD) and certain types of cancer (prostate, breast and colorectal)
  • improve the intestinal flora imbalance, which will help to increase production of antimicrobial compounds, modulating the immune system
  • prevent against early age-related macular degeneration
Tips on healthy eating with low GI


  • Eat two or more servings of fruits and vegetables every day

  • Include more beans and legumes such as soybeans and chickpeas in your diet.

  • Substitute your high GI breads, rice, and cereals with low GI varieties.

  • Consume less processed food. Use rolled oats instead of instant oats.

  • Include at least one low GI food in every meal.

  • Consume lower GI staple such as wholegrain cereals (e.g. brown rice & barley)


How is GI Testing conducted?


GI testing (in vivo) is conducted in heathy human subjects. Glucose is used as the reference food to compare against the test food. The reference food has to be taken two to three times on separate days and test food is tested at least once in each subject. A minimum of 10-12 subjects will be involved to determine the GI value of a test food.

Consultancy and Testing Services



In vivo (in humans):

  • Glycemic Index testing of single foods, mixed meals, food products and food ingredients
  • Glycemic response testing
  • Insulinemic index & Insulinemic response testing
  • Glycemic Load
  • Post-prandial triglyceride response
  • Continuous glucose monitoring
  • Dose response and bioavailability studies 
  • Efficacy testing
  • Nutrition intervention studies
  • Sports performance and GI
  • Cognition and GI


In vitro (lab based):

  • Conduct in vitro GI analysis as preliminary GI screening tool to save time and cost
  • Carbohydrate Analysis 
  • Analysis of resistant starch

Offer consultancy services in:

  • Low GI product development
  • Creation of low GI meals and recipes 


  • Continuing Education Training (CET) courses in Glycemic Index and Glycemic Response
  • Customised certificate courses and hands-on workshops

Recruitment of Research Study Participants

Recruitment is in progress for all our ongoing studies:


What are the foods that can be tested for GI?

What are the foods that can be tested for GI?

Food or beverage that contains carbohydrate can be tested. If you have any enquiries, please contact us to find out more. 

Is there an eligibility criteria to be a study participant?

Is there an eligibility criteria to be a study participant?

You are eligible to participate in Glycemic Index testing if you fulfil the criteria listed below:

  • Age: 19-60 years

  • BMI: 18.5-25 kg/m2

  • Healthy, non-smoking, no history of illness


Note: The requirements differ for different research studies. Please contact us below to find out more!

When and where is the testing conducted?

When and where is the testing conducted?

We are located in Temasek Polytechnic at the Glycemic Index Research Unit (GIRU), East Wing, Block 1A, Level 1, Unit 83. The nearest MRT station is Tampines West (DT31). GI testing is conducted in the morning after an overnight fast.


If you are interested to participate in the GI testing or have any further enquiries, kindly contact us below. 


Contact Details

Enquiry Form

  • Dr Kalpana Bhaskaran
  • 67805355
  • 8.00 am to 5.00 pm (Mon to Fri) 8.30 am to 2.00 pm (Sat, when required)
    Closed on Sun & Public Holidays
  • Glycemic Index Research Unit

    Temasek Polytechnic

    East Wing, Block 1A, Level 1, Unit 83

    21 Tampines Ave 1

    Singapore 529757