Using Glycemic Index to Manage Blood Sugar and Diabetes
The Evidence for Low-GI Diets in Diabetes
A Cochrane review found that low-GI diets reduce HbA1c by 0.5% on average compared to higher-GI diets in type 2 diabetes — comparable to some medications for mild cases. Combined with calorie reduction and weight loss, the effect is larger.
Key Principles for Diabetic GI Management
1. Prioritize low-GI carbohydrate sources (legumes, barley, oats, sweet potato). 2. Control total carbohydrate portion size — GL matters more than GI alone. 3. Add fiber to every meal — slows glucose absorption. 4. Include protein and healthy fat with carbohydrate sources — reduces glycemic response of the meal. 5. Avoid refined and processed grains.
Post-Meal Blood Sugar Targets
For type 2 diabetes: fasting <7 mmol/L (126 mg/dL); 2-hour post-meal <10 mmol/L (180 mg/dL). A low-GI meal pattern helps keep 2-hour post-meal values within target, reducing overall glycemic variability and HbA1c.
Combining GI Lookup With Diabetes Risk Assessment
Use Glycemic Index Lookup to evaluate individual food choices. This is a supportive tool for managing an evidence-based low-GI diet pattern alongside your healthcare team’s recommendations.
Frequently Asked Questions
Look up foods by GI
Open Glycemic Index Lookup to find the GI and GL values of foods in your diet.
Open Glycemic Index