When we talk about something that "does wonders," we mean that it has a profoundly positive impact. There are several synonyms you can use instead of "does wonders" to convey this sentiment. One option is to say that something "works miracles." This suggests that the results are so exceptional that they defy explanation. Another alternative is to say that something "works magic." Like "works miracles," this expresses a sense of awe at the efficacy of the thing in question. Other possible synonyms for "does wonders" include "has amazing effects," "performs marvels," and "brings about incredible outcomes." Regardless of which phrase you use, the message is clear: this thing is truly transformative.