The text on these boxes is in Scandinavian languages. It basically says, among other things, that they are ready to eat, boiled green lentils, and that they should be rinsed with water before use.
That means one should drain the liquid they are immersed in and rinse with clean water.
For all these years, I never read the text on the box, and consequently never rinsed them. I just drained most of the liquid and used them as they were.
What would be the potential consequences of not rinsing them?