Could someone offer some guidance for using verbal nouns? In particular, those of the form “zu(m/r) or beim/bei der [the infinitive of the verb in noun form].” When should I replace verbs with these constructions? What affect does choosing the verb instead of the verbal nouns (and vice versa) have on the reader? Does usage change throughout the registers? Any other notes would be welcome.
Here's an example from Quora:
"Ist Blockfett ungesund zum Essen?"
Why is it "zum Essen" rather than "zu essen"?