How many times is it recommended to use the melasma skin booster?

As I enter my 40s, my melasma seems to be getting darker, so I am looking into various treatments. In particular, I have become interested in melasma skin boosters because I have heard a lot about them helping to improve pigmentation.

However, since I have heard that it is difficult to see results with just one session, I am most curious about the recommended number of sessions. It seems that the guidance varies slightly from hospital to hospital, so I would like to hear opinions from those who have actually experienced it regarding the typical recommended frequency.

I am also curious about how you maintained your results after receiving all the recommended sessions of the melasma skin booster. I would like to know if your satisfaction was maintained over time, and how long after receiving additional treatments you received them.

If anyone has tried the melasma skin booster, please share an honest review regarding the recommended number of sessions you received and the results. I would like to use this as a reference before getting a consultation.