Apologies, I misread your previous comment. You're correct that the requirement is for 100g/100ml "as sold" not "as prepared". The other commenter is incorrect

Apologies, I misread your previous comment. You're correct that the requirement is for 100g/100ml "as sold" not "as prepared". The other commenter is incorrect. So milk powder, for example, would have a mandatory nutrition label showing 100g of powder and then the company can optionally add a second label showing nutrition for a serving of prepared liquid milk. Since most companies add whatever serving makes it look best it becomes habitual to filter out the serving size info. If anyone wants to dive further into this it's EU regulation 1169/2011 Annex 1.