Topic: LiteraturePlays

Last updated: March 30, 2019

Mini research project
Consumer studies

5454652989489Seithati Khumalo
The Wykeham Collegiate
Grade 11
00Seithati Khumalo
The Wykeham Collegiate
Grade 11
Topic: You are what you eat
Hypothesis: The Glycaemic Index plays a very influential part in our health and well-being as it affects our appetite which influences our energy levels which imapcts how we feel.

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Review of literature:
Source 1:
The Glycemic Index Foundation.What is GI.Available at: on 10 May 2018
This website is reliable as the website is managed by The Glycemic Index Foundation
This sources informs us about the Glycaemic index and the effects of carbohydrates to our bodies.

Source 2:
Brand Miller,J.,Marsh,K.,Sandall,P.2007.The New Glucose Revolution.Philadelphia.

This book is reliable as the authors all have a degree of some kind and their jobs focus on the health of humans by focusing in fields such as diabetes and other health related issues.

This books informs us
Source 3 :
Department of Health & Human Services.Carbohydrates and the glycaemic index.Available at: on 10 May 2018
This website is reliable as it is managed and controlled by the Department of Health and Human Services and was created with its intent being to educate people about the Glycaemic Index.

2.1. The definition of Glycaemic Index (GI)
The Glycaemic Index is a rating of carbohydrates found in foods according to how they affect your blood glucose levels.

The difference between Glycaemic Index and Glycaemic Load
The Glycaemic Index (GI) is a ranking solely based on how the carbohydrates affect your blood sugar. The Glycaemic Load is a rating based on the combination of the Glycaemic Index and the amount of carbohydrates found in food. The Glycaemic load is defined by the amount of carbohydrates in a portion of food multiplied by the GI value divided by 100.

2.2. The GI Rating Scale:
A low GI has a value of 55 or less. A medium/moderate GI value is 56-69.A high GI value is 70 or more.

2.3. What is insulin?
Insulin is a hormone produced by the pancreas that enables your body to use sugar (glucose) from carbohydrates in the food you consumed for energy or to store glucose for future usage.

2.4 The ideal blood glucose level in human beings and why is it considered ideal.

A human beings ideal fasting blood sugar on awakening should be under 100 mg/dl. Before-meals a normal glucose levels are 70–99 mg/dl and up to 140mg/dl two hours after eating. A person will have diabetes when the fasting blood glucose is level is at 126mg/dl or above. The safe blood sugar level is between 70 to 105mg/dl ensuring that you still have the right amount of energy but your blood glucose levels are never extremely high or extremely low.

2.5 State the classification of foods according to the G.I. rating scale and give 10 examples of foods for each of the 3 groups. Provide the G.I. ratings for each example
LOW GI Sweet corn,on the cob,boiled 48
Sweet potato,baked 46
Carrots,peeled,boiled 41
Tomato,canned 45
Lentil,canned 44
Long grain rice,white,Mahatma,boiled 50
Soba noodles,instant,served in soup 46
Gluten-free Muesli 39
Oat bran,raw,unprocessed 55
Pumpernickel bread 50
Medium GI Lemon squash soft drink 58
Whole-grain rye bread 58
Puffed buckwheat 65
Life,Quaker Oats 66
Polenta(cornmeal),boiled 68
Ryvita Currant Crispbread 66
Condensed milk,sweetened,full fat 61
Noodles,dried rice,boiled 61
Sugar,white 68
Golden syrup 63
HIGH GI Gatorade 78
Swede (rutabaga) 72
Radishes,red 75
Pumpkin ,boiled 75
Potato,baked,without skin 85
Glucose Syrup 100
Brown Pelde rice,boiled 76
Corn pasta,gluten-free,boiled 78
Kumara,boiled 77
Rice cracker,plain 91
2.6. Explain the effects on the body of eating foods from each of the 3 categories according to the G.I. rating scale.

Foods with a High GI can cause a sudden rise in glucose levels due to this the body will pancreas will produce insulin. The high amount of insulin produced causes glucose levels in the blood to suddenly decrease and this create the feeling of hunger even if you weren’t hungry before. Food with a Low GI are good and beneficial to your health as Low GI reduces the risk of chronic disease.


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