For people with diabetes, these spikes can be dangerous. Doctors stress that stable blood sugar is essential for preventing complications such as:
- Nerve damage (neuropathy)
- Kidney disease (nephropathy)
- Eye problems (retinopathy)
- Cardiovascular disease
Since bananas are ranked in the medium-to-high range on the glycemic index (GI), they can cause blood sugar to rise more quickly than lower-GI fruits like berries or apples. That doesn’t mean they must be avoided completely—it simply means they must be handled carefully.
