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Banana glycemic index (GI)

Article author photo Zvart Movsisyan by Zvart Movsisyan | Last updated on October 31, 2023
Medically reviewed by Ani Harutyunyan Article author photo Ani Harutyunyan

By investigating scientific studies, we found different values for bananas’ Glycemic Index (GI). Let’s discuss the most trustworthy ones.

According to the GI data of Harvard Medical School, banana has a low GI of 51 ± 3 (1).

One study found that factors such as size, texture, viscosity (internal friction or ‘thickness’), and ripeness of a food affect its GI. For instance, although both ripe and unripe bananas have a low GI (less than 55), an unripe banana may have a GI of 30, while a ripe banana has a GI of 51 (2).

In The International Table of Glycemic Index Values, over ten different GI values, falling in the range of 30 to 75, are published for bananas, with the mean values listed underneath the data. Besides, we can notice from the table that some values fall in the low, medium, or even high GI category. These inconsistencies are caused by reasons such as methodological factors, varieties, different test methods of different laboratories, etc. (3).

Banana glycemic index may vary depending on its starch and amylopectin content too. A study comparing three different banana plants shows that the lowest GI belongs to the species that contain the lowest amounts of starch and amylopectin (5). 

Another research compared different varieties of bananas (4). This research shows significantly higher GI values for bananas overall, with the highest being the Njalipoovan banana and none having a low GI value.

Banana Glycemic index various sorts

Thus, summing up all the data, we decided to choose 48 for the banana’s average glycemic index value.

You can also see the glycemic indexes for 350+ foods on our glycemic index chart page


  1. The glycemic index for 60+ foods
Article author photo Zvart Movsisyan
Education: Medical Biochemistry MD
Last updated: October 31, 2023
Medically reviewed by Ani Harutyunyan

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Data provided by should be considered and used as information only. Please consult your physician before beginning any diet.