Pragmatic Carbohydrate Quality Metrics in Relation to Glycemic Index, Glycemic Load, and Front-of-Pack Warning Labels in Grain Foods
Abstract
:1. Introduction
2. Materials and Methods
2.1. Population and Setting
2.2. Dietary Assessment
2.3. Carbohydrate Metrics
- At least 1 g of fiber (10:1)—First proposed metric, recommended by the American Heart Association based on the naturally occurring carbohydrate-to-fiber ratio found in the whole wheat flour, and aiming to capture the relative balance between the contents of refined starch and added sugar vs. whole grain and bran [12,14].
- At least 1 g of fiber and less than 1 g of free sugars (10:1:1)—Follows the same rationale of the 10:1 metric, with further incorporation of the recommendation of less than 5% of energy from free sugars [10,13,14]. According to the recommendations, a usual diet (e.g., 2000 kcal) should contain 50% of total calories from carbohydrates (e.g., 1000 kcal or 250 g), 25 g of dietary fiber, and less than 5% of total calories from free sugar (e.g., 100 kcal). Altogether, these recommendations are the 10:1:1 metric basis.
- At least 1 g of fiber, and less than 2 g of free sugars per each 1 g of fiber (10:1|1:2)—Follows the same rationale of the 10:1 and further limits the amount of free sugars depending on the fiber content [10,13,14]. This is particularly relevant to investigate whether the balance between fiber and free sugar would favorably affect cardiometabolic health considering differences in glycemic response.
2.4. Glycemic Index and Glycemic Load
2.5. Warning Label Systems
2.6. Statistical Analysis
3. Results
3.1. Grain Foods Meeting Each Carbohydrate Quality Metric
3.2. Association of Carbohydrate Quality Metrics with Glycemic Index and Glycemic Load
3.3. Association between Carbohydrate Quality Metrics and Warning Labels
3.4. Association between Carbohydrate Quality Metrics and Nutrients from the Warning Labels
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Grain Food Categories 1 | # 2 | % (95% CI) | Percent Meeting Each Metric 3 | Kappa | |||
---|---|---|---|---|---|---|---|
10:1 | 10:1:1 | 10:1:2 | 10:1|1:2 | ||||
% (95%CI) | % (95%CI) | % (95%CI) | % (95%CI) | ||||
Flour and dry mixes | 9 | 3.8 (1.9–7.0) | 55.6 (23.5–83.5) | 55.6 (23.5–83.5) | 55.6 (23.5–83.5) | 55.6 (23.5–83.5) | 1.00 |
Yeast breads, rolls | 50 | 20.5 (15.9–26.1) | 18.0 (9.5–31.3) | 10.0 (4.2–22.1) | 18.0 (9.5–31.3) | 18.0 (9.5–31.3) | 0.85 |
Quick breads | 5 | 2.0 (0.9–4.9) | 0.0 (-) | 0.0 (-) | 0.0 (-) | 0.0 (-) | 0.00 |
Cakes, cookies, pies, pastries, bars | 110 | 45.1 (38.9–51.4) | 4.5 (1.9–10.6) | 0.0 (-) | 0.0 (-) | 0.0 (-) | −0.01 |
Crackers and salty snacks from grain products | 27 | 11.1 (7.7–15.7) | 18.5 (7.8–38.1) | 14.8 (5.5–34.0) | 18.5 (7.8–38.1) | 18.5 (7.7–38.1) | 0.94 |
Pancakes, waffles, French toast, other grain products | 5 | 2.0 (0.9–4.9) | 0.0 (-) | 0.0 (-) | 0.0 (-) | 0.0 (-) | 0.00 |
Pastas, cooked cereals, rice | 24 | 9.8 (6.7–14.3) | 25.0 (11.4–46.3) | 25.0 (11.4–46.2) | 25.0 (11.4–46.2) | 25.0 (11.4–46.2) | 1.00 |
Cereals, not cooked or NS as to cooked | 14 | 5.7 (3.4–9.5) | 57.1 (30.7–80.1) | 28.6 (10.7–57.3) | 35.7 (15.1–63.5) | 50.0 (25.1–74.9) | 0.66 |
Overall | 244 | 100.0 (-) | 15.6 (11.5–20.7) | 9.8 (6.7–14.3) | 12.3 (8.7–17.1) | 13.1 (9.4–18.0) | 0.86 |
Carbohydrate Metrics 1 | Glycemic Index | Glycemic Load | ||||||
---|---|---|---|---|---|---|---|---|
Mean (SE) | Median (IQR) | Diff. (SE) 2 | p-Value | Mean (SE) | Median (IQR) | Diff. (SE) | p-Value | |
10:1 | ||||||||
Yes 3 | 57.0 (2.5) | 61.4 (25.0) | −9.0 (1.9) | <0.001 | 11.2 (1.2) | 10.9 (10.5) | −10.3 (1.7) | <0.001 |
No 4 | 66.0 (0.7) | 66.8 (4.3) | 21.5 (1.2) | 17.4 (14.7) | ||||
10:1:1 | ||||||||
Yes | 53.0 (3.5) | 50.8 (30.4) | −12.8 (2.2) | <0.001 | 8.6 (1.5) | 7.7 (9.6) | −12.5 (1.8) | <0.001 |
No | 65.8 (0.6) | 66.7 (4.6) | 21.1 (1.1) | 17.1 (13.9) | ||||
10:1:2 | ||||||||
Yes | 56.5 (3.1) | 62.9 (30.0) | −9.2 (2.1) | <0.001 | 10.3 (1.4) | 9.1 (9.6) | −10.9 (1.8) | <0.001 |
No | 65.7 (0.7) | 66.6 (4.4) | 21.2 (1.1) | 17.1 (14.2) | ||||
10:1|1:2 | ||||||||
Yes | 56.2 (3.0) | 57.8 (28.4) | −9.7 (2.0) | <0.001 | 10.6 (1.4) | 9.1 (10.9) | −10.7 (1.8) | <0.001 |
No | 65.8 (0.7) | 66.7 (4.4) | 21.3 (1.1) | 17.1 (14.2) | ||||
Overall | 64.6 (0.7) | 66.6 (5.4) | 19.9 (1.0) | 16.1 (14.1) |
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Fontanelli, M.d.M.; Batista, L.D.; Martinez-Arroyo, A.; Mozaffarian, D.; Micha, R.; Rogero, M.M.; Fisberg, R.M.; Sarti, F.M. Pragmatic Carbohydrate Quality Metrics in Relation to Glycemic Index, Glycemic Load, and Front-of-Pack Warning Labels in Grain Foods. Foods 2024, 13, 1299. https://doi.org/10.3390/foods13091299
Fontanelli MdM, Batista LD, Martinez-Arroyo A, Mozaffarian D, Micha R, Rogero MM, Fisberg RM, Sarti FM. Pragmatic Carbohydrate Quality Metrics in Relation to Glycemic Index, Glycemic Load, and Front-of-Pack Warning Labels in Grain Foods. Foods. 2024; 13(9):1299. https://doi.org/10.3390/foods13091299
Chicago/Turabian StyleFontanelli, Mariane de Mello, Lais Duarte Batista, Angela Martinez-Arroyo, Dariush Mozaffarian, Renata Micha, Marcelo Macedo Rogero, Regina Mara Fisberg, and Flavia Mori Sarti. 2024. "Pragmatic Carbohydrate Quality Metrics in Relation to Glycemic Index, Glycemic Load, and Front-of-Pack Warning Labels in Grain Foods" Foods 13, no. 9: 1299. https://doi.org/10.3390/foods13091299