"Advocate an environmentally friendly, healthy and fashionable life." This sentence is grammatically correct, but from a rhetorical point of view, it can't be regarded as an antithesis. But as a slogan, it is ok.

The friend who asked the question asked, "The word' advocacy' in this sentence should be a verb, but can the word' health' be used as a verb?" This meaning is obviously to use antithetical sentences. But because "advocating" is a verb followed by an object, it is a verb-object phrase; But "health" is an adjective, and the word behind it is not an object, so the structures of the two sentences are different, so they cannot form duality.

Although it is not an antithetical sentence, its grammar is fine, its content is appropriate, and its meaning is incomplete after it is changed (for example, changing it to "pursuing a healthy life" or "pursuing a fashionable life" will reduce its original connotation), so it can be used as an advertising language.