I've been thinking about this one so reply complete with pictures as it's easier to explain!
Short answer yes, but not if it's badly interpreted.
I think the eatwell plate is a poor representation because it's supposed to cover the distribution of elements over time not in one meal . You aren't supposed to eat much fatty/sugary foods ie cakes and biscuits but if you take the plate as a meal plate it implies that you can eat them at every meal rather than occasionally. I also hate the way the modern version uses a lot of processed foods
However, UK guidelines are not that different from French and I know you can definitely achieve a good HbA1c with those,
In UK the guidelines are: not more than 35% fat, 50% carbs. (plus 5 fruit and veg a day etc) and the only difference is that the French have a slightly higher fat bracket 35-40%
Heres what I try to follow most days(not every day, I don't stick to it when I eat out for example. Pleasure is also important ) and I only have two portions of dairy because I take milk in coffee which adds up to another portion.
I do find eating a consistent pattern of meals prevents roller coasting.
0n a daily basis though it really works out very similarly to the eatwell plate.
French schools have to follow the nutritional guidelines so here a diagram of a typical school meal pattern (picture from this
US blog (google menu scholaire or equlibre find hundreds of menus following this pattern)
I had a go at putting this menu into
this calculator for calories/balanced meals. I did it as if it were for me and I gave myself a 1500 calorie a day need (sometimes I eat more, sometimes less)
I had to fiddle a little with quantities but this is what I came up with to get a 9/10 for balance; couldn't get 10!
I probably wouldn't eat peas with the meal and would have a lot more salad and a tomato instead .It would reduce the glucides (carbs) by a bit .I would probably replace the cheese with a plain yoghurt When I did it I still got 9/10 .
I eat mainly carbs at breakfast porridge made with milk and berries (38g) and probably eat more protein and carbs in the evening.
(I suspect an average day would balance out at a little high in protein and probably nearer 45 than 50% carbs)
What I think I'm trying to say is that following the guidelines should not result in the sterotype we sometimes read of huge amounts of pasta, potatoes, rice etc.
Edit absolutely agree with the last post about the necessity of exercise; diet is not the only factor that effects blood glucose levels.