| Glycemic index |
| Food combinations |
| Insoluble fiber content |
| Proportion of protein and timing of protein intake at the meal (earlier and more is better?) |
| Proportion of fat content |
| Concentrated glucose drink consumption (fruit juice) |
| Timing of carbohydrate intake through the day |
| Complexity of carb counting—grams vs. carb choices |
| Inaccurate carb labeling on food products |
| Complexity of carbohydrate intake and insulin coverage in high intensity sports and physical activity |
| Complexity of glucose control in patients with many gastrointestinal comorbid issues including gastroparesis, supplemental feedings including tube feedings, TPN when patients are not eating, and post bariatric surgery |
| Cultural and religious preferences in food |
| Post bariatric and other gastrointestinal nutrient absorption issues |
| Total parenteral nutrition and tube feedings |
| Food restrictions such as gluten intolerance |