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Posted March 01 2012

What is the Glycemic Index and Can It Help me Lose Weight?

 

Mary Bamford the Director of Nutrition here at Newtopia feels that it is really important that we all understand what the glycemic index is and how it can help you to lose weight.  

First things first, the glycemic index (GI) is a measure of how much a carbohydrate-containing food is likely to raise a person’s blood sugar.

For example, carbohydrate foods (fruits, dairy, whole grains, vegetables of sweets and pastries) can be divided into high, medium, and low GI foods. A food with a high GI will raise your blood sugar more than a food with a low GI, with medium GI foods falling somewhere in-between. Studies have found that a low GI diet has many health benefits, including:

  • Lower your risk of type 2 diabetes
  • Control your blood sugar
  • Control your blood cholesterol
  • Reduce your feelings of hunger and appetite

Foods that have a high GI include

  • Sugar, jams, jellies, and other sweets along with several other foods from the grain products food group. These include foods made with white flour such as white bread, bagels, crackers, pancakes, waffles, and many processed breakfast cereals. Instant rice, short-grain white rice, French fries, and baking potatoes (russet) also have a high GI.

Low GI foods include:

  • Most fruits and vegetables, such as broccoli, spinach, cucumbers, lettuce, peppers, apples, oranges, plums and berries
  • Milk products
  • Legumes such as chickpeas, beans and lentils
  • Some high-fibre breads like heavy mixed grains or stone-ground whole wheat
  • Some high-fibre grains like rolled and steel cut oatmeal, pot barley, whole grain couscous
  • Whole grain cereal enhancers such as a teaspoon of psyllium, oat bran, salba and chia
  • Sweet potatoes
  • Whole grain pasta

Can the glycemic index help me lose weight?

There is alot of good evidence to support the use of the glycemic index in weight management. Studies show that low GI diets can help overweight or obese adults lose more weight than a high GI diet. Low GI diets can also help reduce blood fats. More studies are needed to see if weight lost on a low GI diet can be kept off over the long term.

Foods that are high in protein (eg meat, fish, poultry, cheese) and fat (eg butter, oil, margarine) will not affect your blood sugar much, but they still contain calories, so eating too much of these foods can also affect your weight.

Where can I get more information about glycemic index?

The Glucose Revolution: by Brand-Miller, Wolever, Colaguiri and Foster-Powell. A well-written and reliable book on GI.



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