The only thing I could find is this article that cites a study that's says eating 450gr+ of rice per day regularly can increase your risk of diabetes, which seems like a crazy diet for most of the world.

Is that cooked or uncooked?

The rice I buy is 150 calories for 42g uncooked, so 450g uncooked would be 1600 calories. That does sound high for most places.

But that same rice cooked is 200 calories for 150g, so 450g cooked would be 600 calories. That seems quite reasonable.