What are the benefits of medical injections as a melasma skin booster?

No matter how many expensive department store ampoules I buy or how diligently I do a face mask every day, only the surface of my skin feels moisturized for a short time, and the dryness and loss of elasticity coming from deep within are not resolved at all, so I am feeling discouraged.

I have heard that active ingredients in cosmetics cannot be absorbed into the dermis due to the skin's surface barrier, which is likely why everyone recommends melasma skin booster injections administered directly at a clinic. I am writing this inquiry to find out specifically what advantages this method of directly supplying nutrients to the dermis—whether using a device or manual injection—offers compared to regular home care cosmetics. Will there be a definite difference in terms of the absorption rate of active ingredients?

I am curious if I can truly feel the genuine changes of this melasma skin booster, which makes the skin firm and plump from deep within, commensurate with the money spent. I would also appreciate it if you could answer whether this melasma skin booster treatment would be irritating even for sensitive skin.