How much should I budget for skin barrier strengthening vitamins?

I have a naturally thin and sensitive skin barrier, so my face gets itchy and burning very quickly whenever the seasons change or the weather shifts. My oil-moisture balance seems completely off, and I feel like I'm going crazy from constant dryness, but I can't use functional cosmetics because they cause side effects. I am seriously considering getting the Vitaran treatment, which is said to be good for regeneration and addressing inner dryness using salmon ingredients. People usually book these kinds of injection treatments in 3-session packages; roughly how much should I expect to pay for the Maypure Vitaran treatment when I visit? If anyone has taken advantage of Vitaran pricing promotions to get a good value deal while keeping my budget in mind, please share some tips. Sharing information on reasonable Vitaran pricing or its effects would be a huge help!