Related Experiment Video
Updated: Jul 20, 2026

Mixed Primary Cultures of Murine Small Intestine Intended for the Study of Gut Hormone Secretion and Live Cell Imaging of Enteroendocrine Cells
Published on: April 20, 2017
Burger King and Subway: key nutrients, glycemic index, and glycemic load of nutritionally promoted items
Alexander Bove1, Joseph Hebreo1, Judith Wylie-Rosett1
1The Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, Department of Medicine (Endocrinology), Bronx, New York
Purpose:
The purpose of this investigation was to estimate the glycemic load (GL) of nutritionally promoted fast-food menu items and to compare menu items nutritionally.
Methods:
Published glycemic index (GI) values and nutritional information from the Web sites of Subway and Burger King were used to calculate the GL of nutritionally promoted items. Menu items were compared based on calories, macronutrients, saturated fat, GI, and GL as basic items and as often served.
Results:
Subway offered 7 low-fat (total/saturated fat: 3-5/1-2 g), low-calorie (230-330) sandwich options that had an average GL of 29. If the customer accepts the soda and baked potato chips, the total calories exceed 600 and the total/saturated fat becomes 13/4 g, with a doubling of the GL. The Burger King low-fat options contained 4.5 g total fat and 1.5 g saturated fat, with GLs of 53 to 54, and low-calorie options (265-310 calories) had low GLs (0-18.3). Adding fries and a soda brings the GL up from a 53 for just the sandwich to 123 for the meal. The bunless low-carb Whopper has the same fat content (total/saturated fat: 42/13g) as the original Whopper, but the GI and GL are zero.
Conclusions:
The nutritional information for meal options available at Burger King and Subway can help the patient with diabetes make choices. Accepting the fries or chips and soda can dramatically increase the calories, carbohydrate, fat, and GL of the nutritionally promoted fast-food meal.
Related Concept Videos
Glucose Absorption Into the Small Intestine
Hypoglycemia and Glucagon
Oral Hypoglycemic Agents: Glinides
Hypoglycemia
Hormones Regulating Blood Glucose
In addition to accelerating glucose uptake and utilization, insulin has...
Glucose Homeostasis: Regulation of Blood Glucose
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
