Maximum Health is a suffix that turns up on Armor and Relic. It gives Maximum Health: +18 to +30 at its lowest step, +570 to +783 at its best — and you need item level 116 before the best one can appear at all.

It comes up at weight 5 when the game rolls affixes, never doubles up with another affix that does the same job (maxHealth), and it is what puts the Hare, the Hound, the Bear, the Whale and the Leviathan in an item's name — so you might pick up a Wand of the Hare.

11 Uniques lock it to a fixed number: The Borrowed Hearth, The Overlord's Retinue, Morningshroud, The Moth-Eaten Mantle, Graveweight and Emberscale Mantle and 5 more.