Stat System

Hello, so basically im planning on making a rogue-lite datapack for mc which will involve a skill-tree like upgrading system. What i basically want to do is have a stat system for upgrades. I tried doing that before but ended up having to add different commands an uuid's for each single upgrade of a stat. So what i am wandering is if there is a way to make a scoreboard called health(or something else) and when i chance it the players health will update automatically?