Who is Vitaran recommended for? What skin type?

Lately, my skin feels dull and lacks elasticity, so I've been looking into skin boosters, and Vitaran is highly recommended. I've seen posts saying that Vitaran is particularly well-suited for people with dry skin or concerns about fine lines. Since my skin is on the thinner side, I'm worried it might be too irritating, so I'm curious about reviews from those who have received Vitaran. I'm interested because people say it feels like your skin condition improves naturally, but I want to know how noticeable the effects are. I'm also curious about the treatment frequency and how long the results last, so I'd like to hear opinions from those with experience. My makeup keeps caking and my skin looks dry, so I want to get some treatment; I'm wondering if Vitaran helps improve internal dryness as well. Additionally, I'd like to know how long redness or bumps last after receiving Vitaran.