Мне вредно пить газировку каждый день.

to drink

Breakdown of Мне вредно пить газировку каждый день.

• каждый: every
• день: the day
• мне: me

Questions & Answers about Мне вредно пить газировку каждый день.

Why is it мне and not я or меня?

Russian uses the dative case to mark the “experiencer” in impersonal sentences with predicatives like вредно, можно, нужно, полезно, холодно. So you say кому? — мне (to whom? — to me). The literal structure is “To me it is harmful to drink soda every day.”
Common patterns: Мне холодно, Мне нужно учиться, Мне можно/нельзя есть орехи, Мне полезно гулять.

What exactly is вредно here: an adverb or an adjective?

It’s a predicative (short-form adjective in neuter), often taught as a “category of state” word. In this impersonal use, вредно doesn’t agree with any noun; it’s a fixed predicate meaning “harmful.” Compare with short forms when there is an explicit subject: вреден (m), вредна (f), вредно (n), вредны (pl).

Why is пить in the infinitive?

The infinitive can function as the subject-like element of an impersonal sentence: “To drink soda every day is harmful (to me).” So пить names the general activity that is evaluated as harmful.

Why is газировку in the accusative?