Questions regarding Rejuran procedure

I think I heard that Rejuran is good for internal dryness. Is that correct? Is it correct that the medication is injected by directly puncturing the skin with a needle?

My skin concerns are internal dryness and redness, so I am curious if this product is effective for internal dryness or redness in addition to improving skin texture.

If I work over the weekend, will I be able to come to work on Monday?

I'm also curious about how many times I need to get it (the frequency), and I would appreciate it if those who have tried it could let me know what the experience is like!