How to read GI & GL

GI (Glycemic Index) rates how fast the carbohydrates in a food raise blood glucose compared to pure glucose (= 100). Low GI ≤ 55 means a slow, steady rise. But GI says nothing about how much carbohydrate you're actually eating.

GL (Glycemic Load) fixes that. It multiplies GI by the actual grams of carbohydrate per typical serving: GL = GI × carbs per serving ÷ 100. This makes it the more useful number for real-world blood sugar management.

Why they can disagree — a food with low GI can still carry a high GL if the serving is large and carb-dense. Conversely, watermelon has a high GI (72) but a low GL (4) because a normal portion contains very few carbs. Always read both together.

Low GL ≤ 10 Modest total glucose impact per serving.
Medium GL 11–19 Moderate impact — manageable for most.
High GL ≥ 20 Significant carb load per serving. Consider a smaller portion.

Source: Atkinson et al., International Tables of GI & GL Values 2021, Am J Clin Nutr.

Glycemic Index & Load

49
GI Score
🟢 Low GI
6
GL / Serving
Low Load

Low GI food — causes a slow, steady rise in blood sugar. Ideal for sustained energy, blood glucose control, and reducing insulin demand.

Glycemic Load (GL = GI × carbs ÷ 100) accounts for portion size. A low GL means this food has minimal real-world blood sugar impact.

Source: Atkinson et al., International Tables of GI & GL Values 2021, Am J Clin Nutr
Nuts & Seeds Tree Nuts 🇬🇧 CoFID 2021