Fu-ru-ri-re-ro

The Krispy Kreme fuss is stll going strong, and McDonalds is as popular as ever. In truth, although the Japanese eat healthily at home, they drink a lot of beer, and eat a lot of fried food when they're out and about. So why are they comparatively a thin nation?


Incredulously, I read last night that, on average, Japanese people have longer intestines - reports of up to 3 metres longer! - thus their digestion takes longer. Supposedly, this is the reason, but with no hard scientific evidence, it's difficult to take it without a pinch of salt.

Any other ideas?