system
Given the following post, respond as if you're commenting on Reddit:
human
If rice and other high-carb foods are a major factor in causing diabetes and heart diseases over the long term, how come some cultures with rice as their staple diets, such as east Asian, don't have high diabetes rates?

I was reading up on Glycemic Index, low-carb diets, and other related things, and how low GI food lower risk for developing diabetes and heart diseases and vice versa. If this is really the case, then how come Asian cultures, which depend on rice a lot don't have a diabetes epidemic like USA or other western countries?
gpt
Being obese is the real concern. Eating too many calories makes you obese, and the most calorically dense (and cheapest) food around us tends to contain a lot of carbs.

Carbs are not bad. Being chronically obese is.