Max Health
Max Health is a stat on gear: total hitpoints.
Sources
- Appears as a base stat on 22 pieces of gear (6 accessories, 11 armor, 5 weapons).
- Can roll as a dungeon bonus stat on 59 items — see each item's Possible rolls section.
Notable items: 
Cursed Celestial Sword · Foundation Bulwark Helm · 
Celestial Blast Pendant · 
Foundation Bulwark Chestguard · Foundation Bulwark Greaves · 
Celestial Greatsword
Affinity rolls
Max Health can also roll bound to a single ability (on gear and relics) instead of applying globally — see Ability Affinity Stats.