A Beginner’S Guide – Glycaemic Index And Gyclaemic Diet (3)

1. A Beginner’S Guide – Glycaemic Index And Gyclaemic Diet

2. GLYCAEMIC INDEX (GI) We have all heard that low glycaemic index (GI) foods are better for you and many doctors now advice their patients to have food products low in GI – what does all this really mean? The glycaemic index (GI) is obtained by measuring the effect that a carbohydrate containing food has on blood sugar levels, compared to the effect of the same amount of pure sugar, on blood sugar levels. The term was introduced in 1981 by David J. Jenkins, a Canadian professor. It is useful for quantifying the relative rapidity with which the body breaks down carbohydrates. It takes into account only the available carbohydrate (total carbohydrate minus fiber) in a food. Glycemic index does not predict an individual’s glycemic response to a food, but can be used as a tool to assess the insulin response burden of a food, averaged across a studied population.

3. Factors affecting the glycaemic index There are various factors that affect the GI of a food. These include the types of sugar and starches in the food, the way it is prepared, and it’s fat and fibre content. How rapidly the food product is digested and absorbed is very important in determining the GI. Generally, foods with a low level of starch and high in fibre tend to have a lower GI level – ie whole grains, oats and barley. Let’s break it down for better understanding. The index typically categorizes foods as low, medium, and high. The following ranges are usually applied to determine the GI of a particular food: • Low GI – 55 or less. • Medium GI – 56 to 69. • High GI – 70 or more.

4. Foods with a low GI means that they cause a slower and lower rise in blood sugar levels. These include mixed-grain and oat breads, fruit, barley, pasta, noodles, beans, sweet potatoes, green peas and milk. • Foods with a high GI means that they cause a faster and higher rise in blood sugar levels. High GI foods include white bread, steamed white rice, chips and coffee A number of factors can influence the GI value of a food or meal, including: • Sugar- There’s a misconception that all sugars have a high GI. The GI of sugar ranges from as low as 23 for fructose to up to 105 for maltose. Therefore, the GI of a food partly depends on the type of sugar it contains. • Starch- Starch is a carb comprising two molecules — amylose and amylopectin. Amylose is difficult to digest, whereas amylopectin is easily digested. Foods with a higher amylose content will have a lower GI. • Carbohydrate– Processing methods such as grinding and rolling disrupt amylose and amylopectin molecules, raising the GI. Generally speaking, the more processed a food is, the higher its GI. • Nutrient composition– Adding protein or fat to a meal can slow digestion and help reduce the glycemic response to a meal

5. Benefits • Low Cholesterol levels: The low GI diets reduce total cholesterol by 9.6% and LDL (bad) cholesterol by 8.6%. When combined with a high fibre diet, a low glycaemic diet will help lower cholesterol levels, especially low-density lipoproteins or bad cholesterol. LDL cholesterol is also associated with an increased risk of heart disease and stroke. • Weight Loss: It is common knowledge that cutting down on sugar and ditching unhealthy sweet things will help you lose the kilos and the inches quicker and also help you maintain a more healthy, active and fit lifestyle. A low glycaemic diet steers clear from all these foods helping you shed a significant amount of weight. The diet also propagates foods that are fibre heavy and fibre found in most of foods can help you feel fuller thereby suppressing appetite and curbing hunger pangs. • Reduced risk of cancer: Some studies suggest that people who consume high GI diets are more likely to develop certain types of cancer, including endometrial, colorectal, and breast cancer, compared with people on low GI diets. • Blood Sugar Control: It has been clinically observed that people who tend to consume a low glycaemic diet also tend to have better control over their blood sugar levels.

6. Foods that are measured lower on the glycaemic index are also slowly digested and metabolized by the body thereby releasing glucose into the bloodstream steadily and gradually. This keeps the blood sugar levels in a safe range by preventing unusual and unnatural spikes and drops from occurring. Following a low glycemic diet may offer several health benefits, as it could help balance your blood sugar levels, lower your cholesterol, and increase short-term weight loss. “The food you eat can be either the safest and most powerful form of medicine or the slowest form of poison.” — Ann Wigmore

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