Deutsche Gesellschaft für Ernährung

Exactly.

Now regarding fiber, there is a recommendation from the German Nutrition Society.

And even if we don't agree with the DGE on many points regarding daily nutrient amounts for fiber, they say you should consume at least 30 grams per day.

If you look at the studies, the optimal range is a bit higher, somewhere in the range of 40 to 50 or 35 to 50 grams per day, depending a bit on how how much you move, how high your energy requirement is and so on and so forth.