Maximum Health is a suffix that turns up on Head, Armor, Boots, Ring and Relic. It gives Maximum Health: +12 to +21 at its lowest step, +491 to +696 at its best — and you need item level 116 before the best one can appear at all.

It comes up at weight 10 when the game rolls affixes, never doubles up with another affix that does the same job (maxHealth), and it is what puts Vitality, Vigor, Hardiness, Fortitude and Immortality in an item's name — so you might pick up a Wand of Vitality.

19 Uniques lock it to a fixed number: Warden's Vow, Skyward Step, Tome of Hollow Echoes, Last Keeper's Lantern, Doorbreakers and A Patch of Night and 13 more.