Did Orthomol vitamins definitely have an effect on inner beauty?

I'm planning to order directly from overseas because I heard the ingredients differ between domestic and foreign products. Does this product really work? A month's supply costs well over 70,000 won, so it really needs to be effective. Since it's so expensive, I'm worried I might just feel like it's good and experience a placebo effect. For those who have taken it for a few months, what is your experience?