I'm curious how long Vitaran will last.

My skin is very sensitive and dry, so I was recommended Vitaran instead of Rejuran. I am leaning towards it because it is said to be less painful, but how long does the effect of Vitaran last after just one injection? I need the moisturizing effect to last so I don't feel like I wasted my money. Does the dewy skin last for more than a month after getting Vitaran?

Or I am wondering if it returns to normal within a week. Since my skin is extremely dry, longevity is the most important factor for me. I would appreciate it if those who have tried it could share what they were satisfied with or what they found lacking!

My face tends to feel incredibly tight right after washing, so I really hope this time the inner dryness is definitely resolved. Since I'm spending a lot of money on this, I'm worried I'll be so upset if the effects are only temporary and my skin becomes dry and rough quickly. Please share any home care tips or supplementary routines you have to help maintain the results!