What is a GI diet?
What is GI?
Definition of GI: Glycemic index - a score system from 1 to 100 in which
foods which contain carbohydrates are ranked according to the speed at
which they're absorbed into the blood (after chewing and swallowing),
and then by how much they raise the blood sugar level.
GI index : This is a measure of the speed at which foods are broken down
by the body to form blood sugar.
All carbohydrates are broken down in the stomach into sugars. These are
then absorbed into the bloodstream through the intestines.
Some foods (cornflakes, white bread, white rice) are broken down quickly
abd digested rapidly - this gives them a high GI (score of more than 70)
These are known as HIGH GI foods.
Rye bread and wholegarin foods like all bran, take longer to break down
and are absorbed slowing into the blood strea, These are LOW GI foods.
Foods inbetween (55-70) are known as MEDIUM GI foods.
| High G.I |
quick breakdown. Gives you urge for more once quick sugar rush
over. |
GI 70+ |
| medium GI |
|
GI 55-69 |
| Low G. I. |
slower breakdown. Leave you feeling fuller. |
GI 54 or less |
For particular instructions on dieting using GI you should use reference
books or set diets. This does seem to be a more complicated diet than
some of the others which are easily understandable.
Some GI diet guidelines
One system uses a traffic light colour for hi - being red, medium, amber
and green for low. Green foods can be eaten freely.
Don't overcook carbohydrates.
Use whole grains.
Eat less "milled" products. (Anything from flours)
This all seems quite complicated if you have to start working out the
carbohydrate load of foods.
Don't drink too much coffee - less than 2 cups of coffee a day and less
than 4 teas. Avoid cola and other caffiene drinks. Cut down on your alcohol
too.
Snack on low GI foods such as apples, pears, peaches, berries, low fat
yoghurt, buts and seeds.
Chocolate LOW GI
It is low in carbohydrate but high in fat so its still not good for you!
The reason that using the GI index for dieting is successful is that
a slow rise in blood sugar keeps you feeling full for longer after eating
- so you don't get on a high and then need to snack to regain that high.
Good vegetables
Most veggies have so little carbohydrate that they don't get a GI rating!
This means that they don't affect the blood sugar levels - so you can
eat these fairly freely!
I've read something recently about you lowering the GI of food by
adding protein or lemon juice (or vinegar)- you could add lemon juice
to a baked potato - the article said... But I just thought that sounded
a bit bizarre.
high gi food |
how to lower it |
| Baked potato |
Squeeze of lemon juice added then beany chili sauce |
| Wholemeal toast |
Add protein rich peanut butter |
| Ciabatta |
serve with meat (protein) and salad dressed with a tasty vinegar
such as balsamic |
| Ryvita |
Top with tuna and tomato with vinegar. I will note here that
I love tuna with vinegar on! |
|
GI of some foods
Yogurt (low-fat) 33
White Bread 70
Whole Wheat Bread 69
Kellogg's All Bran 51
Kellogg's Cornflakes 84
Kellogg's Rice Krispies 82
Kellogg's Special K 54
Oatmeal 49
Shredded Wheat 67
Quaker Puffed Wheat 67
Beets 69
Broccoli 10
Cabbage 10
Carrots 49
Corn 55
Green Peas 48
Lettuce 10
Mushrooms 10
Onions 10
Parsnips 97
Potato (baked) 93
Potato (mashed, instant) 86
Potato (new) 62
Potato (french fries) 75
Red Peppers 10
Pumpkin 75
Sweet Potato 54
Cashews 22
Chocolate Bar 49
Corn Chips 72
Jelly Beans 80
Peanuts 14
Popcorn 55
Crisps 55
Snickers Bar 41
Walnuts 15
Apple 38
Banana 55
Melon 65
Cherries 22
Grapefruit 25
Grapes 46
Kiwi 52
Mango 55
Orange 44
Papaya 58
Pear 38
Pineapple 66
Plum 39
Watermelon 103
Graham Crackers 74
Kavli Crispbread 71
Melba Toast 70
Oatmeal Cookies 55
Rice Cakes 82
Rice Crackers 91
Ryvita Crispbread 69
Soda Crackers 74
Shortbread 64
Stoned Wheat Thins 67
Water crackers 78
Sugars GI - these are often used as ingredients
in food - read the label!
Fructose 23
Glucose 100
Honey 58
Lactose 46
Maltose 105
Sucrose 65
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