[QUOTE 4972098, member: 9609"]I seem to recall him saying the sugars are not released from the fruit in your mouth and as such don't pose any danger to the teeth[/QUOTE]
As I recall it was the acid rather than the sugar that was being blamed.
[QUOTE 4972098, member: 9609"]I think he said blenders help release the sugars?[/QUOTE]
Yes, I mentioned further up the thread, the sugar in fruit counts as added sugar like in sweets if you blend it because pulverising the cells releases the sugar more quickly. If you drink fruit juice you need 150g instead of 80g to count as a portion, but it doesn't count as any more if you drink more than 150.
Another factor: I remember on QI the question coming up which is worse for teeth, sweets or crisps. Of course everyone said sweets and of course it turned out to be crisps; the reason being that sweets don't hang around long; crisps get wedged in between teeth, and do their evil work as long as they're there. I imagine 'orange sugar' is all gone within a minute or two.
My dentist said that you should brush your teeth before eating not after. Eating softens the enamel, and if you brush too soon afterwards you will remove the enamel.
It was counting on one hand, I looked it up. The initial campaign was paid for by the Fruit and Veg industry in the early 90's.
It came from the World Health Organisation's report TRS797
"Diet, Nutrition, and the Prevention of Chronic Diseases" published in 1990, following a conference in 1989:
"The population nutrient goals have been set judgementally rather than on the basis of specific evidence as to the necessary level of intake. The recommended lower limit is higher than current intake in many populations and much higher than current intake in some of the developed countries. No upper limit has been suggested." (page 113)
Since then, the WCRF have recommended 7.5 a day, and there was a recent proposal from
Imperial College London to increase it to 10 a day.