What are the recommended number of sessions and treatment cycle for Vitaran?

I was concerned about wrinkles around my eyes and skin elasticity, so I was recommended Vitaran injections containing PN ingredients. I am planning to try them because they are said to help regenerate the skin from deep within, but I am wondering what the recommended number of sessions is to see proper results. I have heard that it is usually difficult to see dramatic changes with just one skin booster session; does this treatment also require repeated sessions for the effects to accumulate like compound interest?

Since the guidelines seem to vary slightly from hospital to hospital, I am curious about the generally recommended number of Vitaran sessions and treatment intervals. If the recommended number of sessions is three or more, how many weeks should I leave between treatments to ensure the least stress on the skin and the most effective results? I would also like to know how often I should get touch-ups after completing the initial recommended sessions to maintain my skin condition. I would appreciate advice from those with experience.