Decoding Glycemic Index of Foods


You have probably heard about eating “carbs” with low glycemic index (GI) can help with weight loss. But what are “carbs”? Carbohydrates are digested in the body and broken down into glucose - a type of sugar that provides fuel for the brain, muscles and most organs to function. Since not all carbohydrates are created equal, different types of carbohydrates in foods are broken down into glucose/sugar in different speed, resulting in different GI values. In another words, GI is used to measure the rate of carbohydrate metabolism in the body and how it affects blood glucose levels.

Foods are assigned GI numbers based on the comparative rises in blood glucose/sugar levels they produce in the body. A high glycemic food is easy to break down into glucose when eaten, causing a quick rise and fall in blood sugar levels due to insulin secretion in response to the blood sugar increase. This can make one to feel hungry sooner, body fat accumulation and weight gain. In contrast, low to moderate glycemic foods take longer to break down into glucose, resulting in a more gradual rise in blood sugar levels, thus maintaining an increased energy level for a longer period. This also means more steady insulin secretion so that the body can maintain the stability of blood glucose and regulate hunger.

Studies that research about dietary habits show that foods with higher GI value are a risk factor for diabetes, obesity, and cardiovascular disease. Therefore, eating a low glycemic diet not only helps to manage weight, it may also help to manage/reduce risk of developing Type II Diabetes, and lower chances of getting heart disease and some cancers.

Interested in learning about weight goal and nutrition needs? Schedule a free body weight and % body fat analysis with Our Smart Eater Dietitians at 626-283-5128 or email to hazel@smarteater.net.

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