Nutrition
Glycemic index vs glycemic load: which one matters in clinic
Glycemic index (GI) is popular but limited. Glycemic load (GL) is the metric that actually predicts post-meal glucose response.
Glycemic index (GI) ranks foods by how they raise blood glucose at a standardized portion of 50 g of carbohydrates. Informative, but misleading when applied to real portions: watermelon has a high GI but very few carbs per serving.
Glycemic load
Glycemic load (GL) adjusts GI by the actual amount of carbohydrates in the consumed portion: GL = (GI × g of carbs) / 100. It is the metric that best predicts real glucose response and how the client feels after eating.
Practical ranges
- GL < 10: low, ideal for diabetes and insulin resistance.
- GL 11-19: medium, manageable for most clients.
- GL > 20: high, control frequency and combine with protein/fat/fiber.
When it really matters
- Type 2 diabetes and impaired glucose tolerance.
- Frequent reactive hypoglycemia.
- Clients with poor satiety after high-carb meals.
Frequently asked questions
What about healthy people without diabetes?
For healthy, active people GI/GL matters less. Overall nutritional quality (fiber, protein, micros) carries more weight than a single post-meal glucose response.
About the author
Equipo Almendra
Editorial · Almendra
The Almendra editorial team brings together nutritionists, engineers, and product managers writing about how to run a modern nutrition practice.
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