Is it more effective to receive Celre Diem consistently rather than just as a one-time treatment?

After being exposed to the office air conditioning all day, my skin feels completely parched deep down, so I was recommended Celle Diem treatment at a dermatology clinic. I am wondering if the hydration lasts a long time after just one session, or if I need to receive it regularly for several consecutive sessions to seriously improve my skin barrier.

As is typical with skin boosters, consistent investment is likely required. I am wondering how long the effects of Celle Diem actually last compared to the cost. For those who have regularly used Celle Diem for skincare, I would appreciate any advice you can share regarding whether it is definitely worth the money in terms of addressing inner dryness or refining skin texture. Please take care of your health in this sweltering heat!