Glycemic index numbers
The GI values mentioned (around 42 for less-ripe bananas and 51–60 for riper bananas) are within a reasonable range often reported in nutrition discussions, but GI varies by banana variety, ripeness, serving size, and what foods are eaten alongside it. These numbers should be viewed as approximations rather than exact rules.
Bottom line
The overall message that different stages of ripeness have different nutritional characteristics is largely correct.
However:
- There is no strong evidence that eating bananas at night is harmful for most people.
- There is some evidence that bananas may support sleep, though they are not a treatment for insomnia.
- The claim that ripe or spotted bananas contain TNF and therefore have special cancer-fighting properties is misleading and not supported by current evidence.
So I’d rate the article as mostly accurate on ripeness and nutrition, but overstated and partly misleading regarding immune and cancer-related benefits.
