Lettuce, iceberg (includes crisphead types), raw & Diabetes
Low glycemic impact for the stated serving. Glycemic load of 1.1 per 100g.
✅ Nutrition data verified · GL 1.1/100g · GI 61.9 · TIER 3 ⚠️ GI: Subcategory Estimate
GI estimated from food subcategory average — not directly tested on this food. [1] [3]
Glycemic Response at a Glance
Nutrition at a Glance
Related Vegetables and Vegetable Products Options
Alternatives to Consider
🥦 Chrysanthemum leaves, raw
GL 0/100g — Low GL
Fiber 3.0g/100g. Rated diabetes-friendly — lower glycemic impact than your current selection.
Chrysanthemum leaves, raw & diabetes →🥦 Chrysanthemum, garland, raw
GL 0/100g — Low GL
Fiber 3.0g/100g. Rated diabetes-friendly — lower glycemic impact than your current selection.
Chrysanthemum, garland, raw & diabetes →🥦 Alfalfa seeds, sprouted, raw
GL 0.1/100g — Low GL
Fiber 1.9g/100g. Rated diabetes-friendly — lower glycemic impact than your current selection.
Alfalfa seeds, sprouted, raw & diabetes →🥦 Mustard greens, frozen, unprepared
GL 0.1/100g — Low GL
Fiber 3.3g/100g. Rated diabetes-friendly — lower glycemic impact than your current selection.
Mustard greens, frozen, unprepared & diabetes →Practical Guidance
💡 Cook Lightly or Eat Raw
Overcooking breaks down vegetable fiber and can increase glycemic impact. Light steaming preserves structure and nutrients.
💡 Check Your Own Response
Individual blood sugar responses vary. Use a glucose meter to understand how this food affects you personally.
💡 Glycemic Load Over Glycemic Index
GL accounts for both the speed AND amount of carbohydrate, making it more practical for real-world eating than GI alone.
💡 Pair Carbs With Protein
Adding protein to a carbohydrate-containing meal slows digestion and helps prevent blood sugar spikes.
FAQ
Can Lettuce iceberg fit into a diabetes meal plan?
Lettuce iceberg has a GL of 1.1 — in the lower range. The carbs are released slowly, or there simply aren't many carbs to begin with. As always, check your personal glucose response.
How much GL does Lettuce iceberg have per serving?
Per 100g, Lettuce iceberg has a GL of 1.1. This means one standard serving (1 cup chopped) provides approximately 1.0 GL — which is low.
Does Lettuce iceberg spike blood sugar?
Lettuce iceberg affects blood sugar by releasing glucose during digestion. Since its GL is 1.1 (low), it's unlikely to cause problems in standard servings. Individual responses vary — check your glucose monitor.
Is the GI value accurate?
The GI of 61.9 for Lettuce iceberg is estimated (Tier 3), not directly ISO-tested on this specific food. It is based on the weighted average GI of foods in the Vegetables and Vegetable Products category from the International GI Tables (Atkinson et al., 2021). Actual GI may vary by variety, ripeness, cooking method, and individual response. We display estimated values with full transparency so you can make informed decisions.
Data Sources
Data Tier: TIER 3 — estimated from category average
Glycemic Index (GI): 61.9 — subcategory_avg:Vegetables and Vegetable Products. Source: International GI Tables (Atkinson, Brand-Miller et al., Diabetes Care, 2021). University of Sydney GI Research Service.
GL (per serving, 89.0g) = 1.1 × 89.0 ÷ 100 = 1.0
Nutrition Data: USDA FoodData Central, SR Legacy Release (April 2018). FDC ID: 169248. Data are in the public domain (CC0 1.0).
GL Classification: ≤10 = Low (Low GL), 11–19 = Moderate (Eat in Moderation), ≥20 = High (Limit). Based on University of Sydney Glycemic Index Foundation classification.
⚠️ GI value is estimated, not directly ISO-tested on this specific food. Actual GI may vary by variety, cooking method, and individual glycemic response.
Cite this page: GlycemicWise. “Lettuce, iceberg (includes crisphead types), raw — Glycemic Load & Diabetes Reference.” GlycemicWise, July 2026. https://glycemicwise.com/foods/lettuce-iceberg-(includes-crisphead-types)-raw/
Dietary reference — not medical advice. This page provides evidence-based dietary reference information for general educational purposes. It is not a substitute for professional medical advice, diagnosis, or treatment. Individual blood sugar responses vary significantly. Always check your blood glucose to understand your personal response to foods, and talk to your doctor or a registered dietitian before changing your diet. Data sources are cited above and publicly available from the USDA and the University of Sydney Glycemic Index Research Service.