Yes, that is possible for Premium users both on iOS and Android.

This means that items can be either be completed when there is data missing (and thus the food item can show a Health Rating as soon as complete) or you can correct incorrect entries.

You will be able to change/add:

- serving size
- calories
- all macros

You will be able to do so by clicking on the product in question and then on Edit Food. Then change/add the information in question and save your changes.

There are certain rules behind the editing so it is not possible to enter any value:
protein + carbs + fat = total amount of calories +/- 20%

Please note:
Verified items have to be reported instead. In those cases Lifesum will change the data.