SugarHigh Team
Banana Glycemic Index (51) and Glycemic Load
| Measure | Value | Source |
|---|---|---|
| GI | 51 (low) | Atkinson 2008, Table 1 |
| Carbs / 100 g | 22.8 g | USDA FDC 173944 |
| Fiber / 100 g | 2.6 g | USDA FDC 173944 |
| Net carbs / 100 g | 20.2 g | Calculated from USDA |
| GL / 100 g | 10 (calculated) | GI × net carbs / 100 |
Short answer: raw banana has an average GI of 51, which is low (55 or less). Source: Atkinson 2008, Table 1 (PMC2584181).
Ripeness matters
Banana GI ranges from 47 to 53 across studies, with overripe banana at 57 (glycemicindex.com). © GI News, University of Sydney.
A published example: a 150 g banana has GI 47, 29.4 g available carbs and GL 14 (glycemicindex.com). © GI News, University of Sydney.
Is banana keto?
At 20.2 g net carbs per 100 g (USDA), banana uses most of a 25 g daily keto carb limit many guides describe, so it rarely fits strict keto days.
FAQ
Is banana low GI?
Yes. The average for raw banana is 51 (Atkinson 2008).
What is the glycemic load of banana?
About 10 per 100 g, calculated from the GI and USDA net carbs.
Does ripeness change banana GI?
Yes. Published values move from the high 40s into the mid-50s as bananas ripen.
Is banana keto?
Usually not on a strict net-carb budget.
