Super sensitive skin - how to improve

What is the best way to support very sensitive skin? Since a young age, I am have allergies (food, pollen, some medication) and have very reactive and sensitive skin. I usually tolerate beauty products for sensitive skin for a couple of months and then my skin starts to react and I need to find a new brand. Is there anything you would recommend to get a less sensitive skin/less reactive? Any supplements? Anything to support the gut bacteria (if that would make a difference?). Thanks