Question 1

What is the Meaning of Glycemic Index?

Accepted Answer

The Glycemic Index (GI) is a numerical system classifying carbohydrate-containing foods by their effect on blood glucose levels after ingestion. It quantifies how rapidly a food elevates circulating glucose compared to a reference food, like pure glucose or white bread, assigned a value of 100. This ranking measures a food's acute glycemic potential.

Question 2

What is the Context of Glycemic Index?

Accepted Answer

Within human physiology, the Glycemic Index functions directly within the metabolic framework of glucose homeostasis and pancreatic insulin secretion. It illuminates how dietary carbohydrates influence postprandial glycemia and subsequent insulin release from beta cells. This system impacts the body's energy regulation and understanding of long-term metabolic health, concerning glucose dysregulation.

Question 3

What is the Significance of Glycemic Index?

Accepted Answer

Clinically, the Glycemic Index holds substantial importance for managing conditions like type 2 diabetes, prediabetes, and insulin resistance. Understanding a food's GI enables informed dietary choices that mitigate rapid blood glucose spikes and reduce chronic hyperinsulinemia, supporting better glycemic control. This knowledge aids in preventing metabolic complications and optimizing nutritional strategies.

Question 4

What is the Mechanism of Glycemic Index?

Accepted Answer

The mechanism relates to how carbohydrates are digested and absorbed as glucose. Rapidly digestible carbohydrates, like refined starches, cause a swift glucose influx and pronounced insulin response. Conversely, fiber-rich foods undergo slower digestion, resulting in gradual glucose release, moderating the postprandial glucose and insulin surge.

Question 5

What is the Application of Glycemic Index?

Accepted Answer

In clinical practice, the Glycemic Index serves as a valuable tool for dietary counseling and patient education, especially for metabolic health management. Healthcare professionals utilize GI values to guide individuals in selecting foods that promote stable blood glucose levels, advising on appropriate carbohydrate sources. This guidance extends to optimizing meal composition to lower the overall glycemic load.

Question 6

What is the Metric of Glycemic Index?

Accepted Answer

A food's Glycemic Index is determined by feeding a standardized 50g available carbohydrate portion to volunteers. Blood glucose levels are measured over two hours, and the area under the blood glucose response curve is calculated. This value is then divided by the reference food's curve area, like glucose, and multiplied by 100.

Question 7

What is the Risk of Glycemic Index?

Accepted Answer

Sole reliance on the Glycemic Index without considering other nutritional factors poses a clinical risk, potentially leading to an unbalanced diet. Focusing solely on a food's GI may disregard its nutrient density, caloric content, or the impact of portion size and meal composition. Misapplication can result in choices not holistically beneficial, possibly neglecting essential micronutrients or promoting excessive caloric intake.

Glycemic Index

Meaning

Context

Significance

Mechanism

Application

Metric

Risk

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