Glycemic Index
What is the Glycemic Index?
Not all carbohydrate foods are created equal, in fact they behave quite differently in our bodies. The glycemic index or GI describes this difference by ranking carbohydrates according to their effect on our blood glucose levels. Choosing low GI carbs - the ones that produce only small fluctuations in our blood glucose and insulin levels - is the secret to long-term health reducing your risk of heart disease and diabetes and is the key to sustainable weight loss.
The glycemic index (GI) is a ranking of carbohydrates on a scale from 0 to 100 according to the extent to which they raise blood sugar levels after eating. Foods with a high GI are those which are rapidly digested and absorbed and result in marked fluctuations in blood sugar levels. Low-GI foods, by virtue of their slow digestion and absorption, produce gradual rises in blood sugar and insulin levels, and have proven benefits for health. Low GI diets have been shown to improve both glucose and lipid levels in people with diabetes (type 1 and type 2). They have benefits for weight control because they help control appetite and delay hunger. Low GI diets also reduce insulin levels and insulin resistance.
Recent studies show we should base our diets on low-GI foods in order to prevent the most common diseases of affluence, such as coronary heart disease, diabetes and obesity.
What are the Benefits of the Glycemic Index?
Eating a lot of high GI foods can be detrimental to your health because it pushes your body to extremes. This is especially true if you are overweight and sedentary. Switching to eating mainly low GI carbs that slowly trickle glucose into your blood stream keeps your energy levels balanced and means you will feel fuller for longer between meals.
o Low GI diets help people lose and control weight
o Low GI diets increase the body's sensitivity to insulin
o Low GI carbs improve diabetes control
o Low GI carbs reduce the risk of heart disease
o Low GI carbs reduce blood cholesterol levels
o Low GI carbs can help you manage the symptoms of PCOS
o Low GI carbs reduce hunger and keep you fuller for longer
o Low GI carbs prolong physical endurance
High GI carbs help re-fuel carbohydrate stores after exercise
How to Switch to a Low GI Diet
The basic technique for eating the low GI way is simply a "this for that" approach - ie, swapping high GI carbs for low GI carbs. You don't need to count numbers or do any sort of mental arithmetic to make sure you are eating a healthy, low GI diet.
Use breakfast cereals based on oats, barley and bran
Use breads with wholegrains, stone-ground flour, sour dough
Reduce the amount of potatoes you eat
Enjoy all other types of fruit and vegetables
Use Basmati or Doongara rice
Enjoy pasta, noodles, quinoa
Eat plenty of salad vegetables with a vinaigrette dressing
High Glycaemic Index Foods (70 or more)
Swap these foods for those with a low GI value or eat them together with a low GI food. For example, having a jacket potatoe with baked beans will lower the GI value of that whole meal.
Food GI
White Rice, steamed 98
Parsnips, boiled 97
Baguette 95
Puffed Wheat 89
Jacket Potato 85
Cornflakes 84
Rice Crispies 82
Rice Cakes 82
Jelly Beans 80
Coco Pops 77
French Fries 75
Cheerios74
Branflakes 74
Bagel 72
Swede 72
Watermelon 72
White Bread 70
Mashed Potato 70
Medium Glycaemic Index Foods (56-69)
You may include a few of these foods each day, but again limit portion sizes if you want to lose weight.
Food GI
Wholemeal Bread 69
Weetabix 69
Crumpet, toasted 69
Ryvita 69
Mars Bar 68
Shredded Wheat 67
Croissant 67
Cantaloupe Melon 67
Pineapple, fresh 66
Rye Bread 65
Couscous 65
Shortbread Biscuit 64
Raisins 64
Apricots, canned in syrup 64
Coca Cola 63
New Potatoes 62
Ice Cream 61
Cheese and Tomato Pizza 60
Digestive Biscuit 59
Honey 58
Basmati Rice 58
Pitta Bread 57
Sultanas 56
Boiled Potatoes 56
Muesli 56
Low Glycaemic Index Foods (55 or Less)
Include some of these foods in each meal or snack, go for low fat choices where possible, such as skimmed milk. When trying to lose weight try sticking to smaller portions, like small servings of pasta and noodles, and only a few squares of chocolate.
Food GI
Sweetcorn 55
Raw Oatbran 55
Banana 55
Special K 54
Crisps 54
Stoneground Wholemeal Bread 53
Kiwi 52
Milk Chocolate 49
Carrots, boiled 49
Baked Beans 48
Peas 48
Orange Juice 46
Green Grapes 46
Macaroni 45
Oranges 44
Lentil Soup 44
Porridge made with water 42
Peaches 42
Chick Peas canned 42
All Bran 42
White Spaghetti 41
Apple Juice 40
Noodles 40
Tomato Soup 38
Pears 38
Apples 38
Wholemeal Spaghetti 37
Low Fat Fruit Yoghurt 33
Skimmed Milk 32
Fettuccine Pasta 32
Butter Beans 31
Dried Apricots 31
Whole Milk 27
Red Lentils 26
Pear Barley 25
Grapefruit 25
Cherries 22
Low Fat Yoghurt with sweetener 14
Roasted and Salted Peanuts 14
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