Hi,
I live in Norway and are quite familiar with the food and drinks you mention
The malt extract, if it is the same that we have in Norway, is advertised like this (translated): "Malt extract is by doctors recomended for gaining strength, stomack regulating and as nutrition for babies.". It is often used when brewing beer and sweetening bread. I wouldn't drink too much of that stuff, if I was you. Not unless you like going to the toilet
A simple search on Google will get you going, I bet.