[stan]

You don't have to dig very far in scientific literature to find out that >80% of lung cancers are caused by smoking.

Digging into scientific literature about colourings it becomes clear that links with those problems listed above are tenuous at best. Even the most common link is with hyperactivity in children, and then that it is not seen to be a clear link by most research. Coupled with that, most countries that banned the colourings have lifted the bans.

To each their own though. You feed you hammy what you are happy with, and I will do the same with mine.