Accuracy in Determining the Glycaemic Impact of Meals by Adding Individual Food Values Is Affected by Food Number, Homeostasis and Glucose Reference Dose
Abstract
:1. Introduction
2. Materials and Methods
2.1. Establishing a Glucose Dose–Glycaemic Response Curve and a Definition of GE50
2.2. Linear Extrapolations from Different Reference Responses and Their Difference from Quadratic
2.3. Inaccuracy in Using Food GGEs Determined with a Single Reference to Obtain a Meal GGE
2.4. Validity of Equation (1) Tested against Clinical Data
2.5. A Criterion Tolerable Discrepancy between True GGE and Linear Estimates
2.6. Data Analysis
3. Results
4. Discussion
5. Conclusions
- The difference between the glycaemic impact of the meal and that of the glucose reference used to determine the GGE content of the food.
- The number of carbohydrate foods whose individual inaccuracies contribute to the total meal inaccuracy.
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Glucose Reference (g) | Linear Equations Linking Zero to Reference Response |
---|---|
10 | y = 1.279x |
20 | y = 1.212x |
30 | y = 1.145x |
40 | y = 1.078x |
50 | y = 1.011x |
60 | y = 0.940x |
Glucose Reference (g) | Equation of Disparity between Linear and True (Homeostasis-Adjusted) GGE |
---|---|
10 | y = −0.0067x2 + 0.067x |
20 | y = −0.0067x2 + 0.134x |
30 | y = −0.0067x2 + 0.201x |
40 | y = −0.0067x2 + 0.268x |
50 | y = −0.0067x2 + 0.335x |
60 | y = −0.0067x2 + 0.4060x |
Linear Estimates of GGE Using Equations in Table 1 | ||||||||
---|---|---|---|---|---|---|---|---|
Glucose Reference | ||||||||
Diet | GL 1 | GGE50 2 | 10 | 20 | 30 | 40 | 50 | 60 |
1 | ||||||||
45 g fibre and fruit cereal | 20.80 | 25.1 | 26.6 | 25.2 | 23.8 | 22.4 | 21.0 | 19.6 |
120 mL 1.4%-fat milk | 1.90 | 2.5 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 | 1.8 |
80 g Rockmelon | 2.60 | 3.5 | 3.3 | 3.2 | 3.0 | 2.8 | 2.6 | 2.4 |
80 g Pineapple | 4.40 | 5.8 | 5.6 | 5.3 | 5.0 | 4.7 | 4.4 | 4.1 |
A Sum of food values | 29.70 | 36.9 | 38.0 | 36.0 | 34.0 | 32.0 | 30.0 | 27.9 |
B 3 Whole meal GGE | 34.07 | |||||||
A-B (inaccuracy) | 2.8 | 3.9 | 1.9 | −0.1 | −2.1 | −4.0 | −6.2 | |
2 | ||||||||
45 g High-fibre cereal | 6.70 | 8.7 | 8.6 | 8.1 | 7.7 | 7.2 | 6.8 | 6.3 |
120 mL 1.4%-fat milk | 1.90 | 2.5 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 | 1.8 |
50 g Strawberries | 0.50 | 0.7 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 |
100 g Grapefruit | 2.30 | 3.1 | 2.9 | 2.8 | 2.6 | 2.5 | 2.3 | 2.2 |
A Sum of food values | 11.40 | 15.0 | 14.6 | 13.8 | 13.1 | 12.3 | 11.5 | 10.7 |
B Whole meal GGE | 14.47 | |||||||
A-B (inaccuracy) | 0.5 | 0.1 | −0.7 | −1.4 | −2.2 | −2.9 | −3.8 | |
3 | ||||||||
80 g Egg omelette | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
40 g Wholemeal bread | 13.30 | 16.7 | 17.0 | 16.1 | 15.2 | 14.3 | 13.4 | 12.5 |
80 g Spinach | 0.20 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
20 g Red capsicum | 0.50 | 0.7 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 |
80 g Grilled tomato | 0.80 | 1.1 | 1.0 | 1.0 | 0.9 | 0.9 | 0.8 | 0.8 |
A Sum of food values | 14.80 | 18.7 | 18.9 | 17.9 | 16.9 | 16.0 | 15.0 | 13.9 |
B Whole meal GGE | 18.45 | |||||||
A-B (inaccuracy) | 0.3 | 0.5 | −0.5 | −1.5 | −2.5 | −3.5 | −4.5 | |
4 | ||||||||
80 g Egg omelette | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
38 g Honey and oat-bran bread | 11.20 | 14.2 | 14.3 | 13.6 | 12.8 | 12.1 | 11.3 | 10.5 |
80 g Spinach | 0.20 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
20 g Red capsicum | 0.50 | 0.7 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 |
80 Grilled tomato | 0.80 | 1.1 | 1.0 | 1.0 | 0.9 | 0.9 | 0.8 | 0.8 |
A Sum of food values | 12.70 | 16.2 | 16.2 | 15.4 | 14.5 | 13.7 | 12.8 | 11.9 |
B Whole meal GGE | 16.01 | |||||||
A-B (inaccuracy) | 0.2 | 0.2 | −0.6 | −1.5 | −2.3 | −3.2 | −4.1 | |
5 | ||||||||
15 g Whole-wheat cereal | 6.60 | 8.6 | 8.4 | 8.0 | 7.6 | 7.1 | 6.7 | 6.2 |
120 mL 1.4%-fat milk | 1.90 | 2.5 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 | 1.8 |
4 g Brown sugar | 1.90 | 2.5 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 | 1.8 |
90 g Banana | 9.40 | 12.1 | 12.0 | 11.4 | 10.8 | 10.1 | 9.5 | 8.8 |
100 mL Orange juice | 4.90 | 6.4 | 6.3 | 5.9 | 5.6 | 5.3 | 5.0 | 4.6 |
A Sum of food values | 24.70 | 32.2 | 31.6 | 29.9 | 28.3 | 26.6 | 25.0 | 23.2 |
B Whole meal GGE | 29.16 | |||||||
A-B (inaccuracy) | 3.0 | 2.4 | 0.8 | −0.9 | −2.5 | −4.2 | −5.9 | |
6 | ||||||||
64 g Muffin | 19.60 | 23.8 | 25.1 | 23.8 | 22.4 | 21.1 | 19.8 | 18.4 |
14 g Peanut butter | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
A Sum of food values | 19.60 | 23.8 | 25.1 | 23.8 | 22.4 | 21.1 | 19.8 | 18.4 |
B Whole meal GGE | 23.81 | |||||||
A-B (inaccuracy) | 0.0 | 1.3 | −0.1 | −1.4 | −2.7 | −4.0 | −5.4 | |
7 | ||||||||
30 g Corn flakes | 21.10 | 25.4 | 27.0 | 25.6 | 24.2 | 22.7 | 21.3 | 19.8 |
125 mL 2%-fat milk | 2.10 | 2.8 | 2.7 | 2.5 | 2.4 | 2.3 | 2.1 | 2.0 |
10 g Brown sugar | 4.80 | 6.3 | 6.1 | 5.8 | 5.5 | 5.2 | 4.9 | 4.5 |
50 g Whole-wheat bread | 15.40 | 19.1 | 19.7 | 18.7 | 17.6 | 16.6 | 15.6 | 14.5 |
10 g Margarine | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 49.40 | 61.5 | 63.2 | 59.9 | 56.6 | 53.3 | 49.9 | 46.4 |
B Whole meal GGE | 50.14 | |||||||
A-B (inaccuracy) | 11.4 | 13.0 | 9.7 | 6.4 | 3.1 | −0.2 | −3.7 | |
8 | ||||||||
110 g Twelve-grain bagel | 39.60 | 42.8 | 50.6 | 48.0 | 45.3 | 42.7 | 40.0 | 37.2 |
30 g Cream cheese | 0.50 | 0.7 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 46.10 | 51.3 | 59.0 | 55.9 | 52.8 | 49.7 | 46.6 | 43.3 |
B Whole meal GGE | 47.81 | 51.42 | ||||||
A-B (inaccuracy) | 3.5 | 11.2 | 8.1 | 5.0 | 1.9 | −1.2 | −4.5 | |
9 | ||||||||
50 g Whole-rye pumpernickel | 10.00 | 12.8 | 12.8 | 12.1 | 11.5 | 10.8 | 10.1 | 9.4 |
10 g Margarine | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
45 g Cracked wheat cereal | 16.20 | 20.0 | 20.7 | 19.6 | 18.5 | 17.5 | 16.4 | 15.2 |
10 g Brown sugar | 6.80 | 8.8 | 8.7 | 8.2 | 7.8 | 7.3 | 6.9 | 6.4 |
125 mL 2%-fat milk | 2.10 | 2.8 | 2.7 | 2.5 | 2.4 | 2.3 | 2.1 | 2.0 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 41.10 | 52.3 | 52.6 | 49.8 | 47.1 | 44.3 | 41.6 | 38.6 |
B Whole meal GGE | 44.00 | |||||||
A-B (inaccuracy) | 8.3 | 8.6 | 5.8 | 3.1 | 0.3 | −2.4 | −5.4 | |
10 | ||||||||
30 g Whole-rye pumpernickel | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
5 g Margarine | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
175 mL Strawberry yoghurt | 7.80 | 10.1 | 10.0 | 9.5 | 8.9 | 8.4 | 7.9 | 7.3 |
142 g Canned fruit | 10.40 | 13.3 | 13.3 | 12.6 | 11.9 | 11.2 | 10.5 | 9.8 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 30.20 | 39.0 | 38.6 | 36.6 | 34.6 | 32.6 | 30.5 | 28.4 |
B Whole meal GGE | 34.54 | |||||||
A-B (inaccuracy) | 4.5 | 4.1 | 2.1 | 0.0 | −2.0 | −4.0 | −6.2 | |
11 | ||||||||
100 g Egg | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
75 g French fries | 10.90 | 13.9 | 13.9 | 13.2 | 12.5 | 11.8 | 11.0 | 10.2 |
25 g While-wheat bread | 7.70 | 10.0 | 9.8 | 9.3 | 8.8 | 8.3 | 7.8 | 7.2 |
5 g Margarine | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 24.60 | 31.7 | 31.5 | 29.8 | 28.2 | 26.5 | 24.9 | 23.1 |
B Whole meal GGE | 29.06 | |||||||
A-B (inaccuracy) | 2.6 | 2.4 | 0.8 | −0.9 | −2.5 | −4.2 | −5.9 | |
12 | ||||||||
60 g Bran muffin | 15.20 | 18.9 | 19.4 | 18.4 | 17.4 | 16.4 | 15.4 | 14.3 |
10 g Margarine | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
125 mL Orange juice | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
A Sum of food values | 21.20 | 26.7 | 27.1 | 25.7 | 24.3 | 22.9 | 21.4 | 19.9 |
B Whole meal GGE | 25.52 | |||||||
A-B (inaccuracy) | 1.2 | 1.6 | 0.2 | −1.2 | −2.7 | −4.1 | −5.6 | |
13 | ||||||||
175 mL Strawberry yoghurt | 7.80 | 10.1 | 10.0 | 9.5 | 8.9 | 8.4 | 7.9 | 7.3 |
142 g Canned fruit | 10.40 | 13.3 | 13.3 | 12.6 | 11.9 | 11.2 | 10.5 | 9.8 |
A Sum of food values | 18.20 | 23.4 | 23.3 | 22.1 | 20.8 | 19.6 | 18.4 | 17.1 |
B Whole meal GE50 | 22.28 | |||||||
A-B (inaccuracy) | 1.1 | 1.0 | −0.2 | −1.4 | −2.7 | −3.9 | −5.2 |
Linear Estimates of GGE Using Equations in Table 1 | ||||||||
---|---|---|---|---|---|---|---|---|
Glucose Reference | ||||||||
Meal | GL 1 | GGE50 2 | 10 | 20 | 30 | 40 | 50 | 60 |
14 | ||||||||
2 slices white bread (54 g) | 20.00 | 24.2 | 25.6 | 24.2 | 22.9 | 21.6 | 20.2 | 18.8 |
2 tsp margarine (10 g) | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
1 tablesp honey (21 g) | 9.00 | 11.6 | 11.5 | 10.9 | 10.3 | 9.7 | 9.1 | 8.5 |
250 mL fruit drink (256 g) | 8.00 | 10.3 | 10.2 | 9.7 | 9.2 | 8.6 | 8.1 | 7.5 |
A Sum of food values | 37.00 | 46.2 | 47.3 | 44.8 | 42.4 | 39.9 | 37.4 | 34.8 |
B 3 Whole meal GGE | 40.63 | |||||||
A-B (inaccuracy) | 5.5 | 6.7 | 4.2 | 1.7 | −0.7 | −3.2 | −5.9 | |
15 | ||||||||
1 cup instant noodles (180 g) | 14.00 | 17.5 | 17.9 | 17.0 | 16.0 | 15.1 | 14.2 | 13.2 |
1 apple (120 g) | 5.00 | 6.6 | 6.4 | 6.1 | 5.7 | 5.4 | 5.1 | 4.7 |
1 soft cereal bar (340 g) | 19.00 | 23.2 | 24.3 | 23.0 | 21.8 | 20.5 | 19.2 | 17.9 |
A Sum of food values | 38.00 | 47.2 | 48.6 | 46.1 | 43.5 | 41.0 | 38.4 | 35.7 |
B Whole meal GGE | 41.47 | |||||||
A-B (inaccuracy) | 5.8 | 7.1 | 4.6 | 2.0 | −0.5 | −3.1 | −5.8 | |
16 | ||||||||
1 roast chicken thigh (119 g) | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
1 baked potato (90 g) | 14.00 | 17.5 | 17.9 | 17.0 | 16.0 | 15.1 | 14.2 | 13.2 |
Portion roast pumpkin (150 g) | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
1 med. portion sweet potato (70 g) | 6.00 | 7.8 | 7.7 | 7.3 | 6.9 | 6.5 | 6.1 | 5.6 |
1 corn on cob (100 g) | 14.00 | 17.5 | 17.9 | 17.0 | 16.0 | 15.1 | 14.2 | 13.2 |
A Sum of food values | 40.00 | 50.7 | 51.2 | 48.5 | 45.8 | 43.1 | 40.4 | 37.6 |
B Whole meal GGE | 43.12 | |||||||
A-B (inaccuracy) | 7.6 | 8.0 | 5.4 | 2.7 | 0.0 | −2.7 | −5.5 | |
17 | ||||||||
2 sausages (142 g) | 2.00 | 2.7 | 2.6 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 |
1 cup mashed potato (180 g) | 22.00 | 26.4 | 28.1 | 26.7 | 25.2 | 23.7 | 22.2 | 20.7 |
1 cup green salad (105 g) | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
2 slices canned beetroot (80 g) | 4.00 | 5.3 | 5.1 | 4.8 | 4.6 | 4.3 | 4.0 | 3.8 |
1 cup canned peaches (208 g) | 9.00 | 11.6 | 11.5 | 10.9 | 10.3 | 9.7 | 9.1 | 8.5 |
0.5 cup custard (120 g) | 7.00 | 9.1 | 9.0 | 8.5 | 8.0 | 7.5 | 7.1 | 6.6 |
A Sum of food values | 44.00 | 54.98 | 56.28 | 53.33 | 50.38 | 47.43 | 44.48 | 41.36 |
B Whole meal GGE | 46.25 | |||||||
A-B (inaccuracy) | 8.7 | 10.0 | 7.1 | 4.1 | 1.2 | −1.8 | −4.9 | |
18 | ||||||||
1 individual steak pie (172 g) | 12.00 | 15.2 | 15.3 | 14.5 | 13.7 | 12.9 | 12.1 | 11.3 |
1 cup fried potatoes (80 g) | 13.00 | 16.4 | 16.6 | 15.8 | 14.9 | 14.0 | 13.1 | 12.2 |
1 apple (120 g) | 5.00 | 6.6 | 6.4 | 6.1 | 5.7 | 5.4 | 5.1 | 4.7 |
A Sum of food values | 30.00 | 38.12 | 38.37 | 36.36 | 34.35 | 32.34 | 30.33 | 28.20 |
B Whole meal GGE | 34.35 | |||||||
A-B (inaccuracy) | 3.77 | 4.02 | 2.01 | 0.00 | −2.01 | −4.02 | −6.15 | |
19 | ||||||||
1 filled bread roll (77 g) | 29.00 | 33.4 | 37.1 | 35.1 | 33.2 | 31.3 | 29.3 | 27.3 |
1 banana (120 g) | 16.00 | 19.8 | 20.5 | 19.4 | 18.3 | 17.2 | 16.2 | 15.0 |
1 can “Coca-cola” (365 g) | 23.00 | 27.4 | 29.4 | 27.9 | 26.3 | 24.8 | 23.3 | 21.6 |
A Sum of food values | 68.00 | 80.6 | 87.0 | 82.4 | 77.9 | 73.3 | 68.7 | 63.9 |
B Whole meal GGE | 60.55 | |||||||
A-B (inaccuracy) | 20.1 | 26.4 | 21.9 | 17.3 | 12.8 | 8.2 | 3.4 | |
20 | ||||||||
2 medium potatoes (180 g) | 30.00 | 34.4 | 38.4 | 36.4 | 34.4 | 32.3 | 30.3 | 28.2 |
1 medium steak (145 g) | 0.00 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
0.5 cups broccoli (82 g) | 1.00 | 1.3 | 1.3 | 1.2 | 1.1 | 1.1 | 1.0 | 0.9 |
0.5 cups pumpkin (110 g) | 4.00 | 5.3 | 5.1 | 4.8 | 4.6 | 4.3 | 4.0 | 3.8 |
0.5 cups carrot (800 g) | 2.00 | 2.7 | 2.6 | 2.4 | 2.3 | 2.2 | 2.0 | 1.9 |
1 cup ice cream (143 g) | 12.00 | 15.2 | 15.3 | 14.5 | 13.7 | 12.9 | 12.1 | 11.3 |
0.5 cups fruit salad (120 g) | 8.00 | 10.3 | 10.2 | 9.7 | 9.2 | 8.6 | 8.1 | 7.5 |
A Sum of food values | 57.00 | 69.16 | 72.90 | 69.08 | 65.27 | 61.45 | 57.63 | 53.58 |
B Whole meal GGE | 54.95 | |||||||
A-B (inaccuracy) | 14.21 | 17.95 | 14.13 | 10.32 | 6.50 | 2.68 | −1.37 |
Total GGE Content of Meal | ||||||||
---|---|---|---|---|---|---|---|---|
Number of Foods | 20 g | 30 g | 40 g | 50 g | ||||
GGE/Food | CI * | GGE/Food | CI | GGE/Food | CI | GGE/Food | CI | |
1 | 20 | 0.00 | 30 | 0.00 | 40 | 0.00 | 50 | 0.00 |
2 | 10 | −1.34 | 15 | −3.02 | 20 | −5.36 | 25 | −8.38 |
3 | 6.66 | −1.78 | 10 | −4.02 | 13.33 | −7.13 | 16.67 | −11.14 |
4 | 5.0 | −2.01 | 7.5 | −4.52 | 10 | −8.04 | 12.5 | −12.56 |
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Monro, J. Accuracy in Determining the Glycaemic Impact of Meals by Adding Individual Food Values Is Affected by Food Number, Homeostasis and Glucose Reference Dose. Nutrients 2023, 15, 3296. https://doi.org/10.3390/nu15153296
Monro J. Accuracy in Determining the Glycaemic Impact of Meals by Adding Individual Food Values Is Affected by Food Number, Homeostasis and Glucose Reference Dose. Nutrients. 2023; 15(15):3296. https://doi.org/10.3390/nu15153296
Chicago/Turabian StyleMonro, John. 2023. "Accuracy in Determining the Glycaemic Impact of Meals by Adding Individual Food Values Is Affected by Food Number, Homeostasis and Glucose Reference Dose" Nutrients 15, no. 15: 3296. https://doi.org/10.3390/nu15153296
APA StyleMonro, J. (2023). Accuracy in Determining the Glycaemic Impact of Meals by Adding Individual Food Values Is Affected by Food Number, Homeostasis and Glucose Reference Dose. Nutrients, 15(15), 3296. https://doi.org/10.3390/nu15153296