83 elixirs consumable items
The Forever catalog holds 83 elixirs consumable items, topping out at item level 58 with Major Troll's Blood Elixir, Greater Arcane Elixir, Elixir of the Mongoose. Potions, elixirs, flasks, food, scrolls, bandages, and other consumables in the Forever catalog. The bread and butter of the auction house: what players buy every raid night, with prices and history on each page.
Item levels run from 5 to 58, for characters from level 1 to 55. 1 bind when picked up and never reach the auction house; 82 can be listed.
The highest item levels here: Major Troll's Blood Elixir (58), Greater Arcane Elixir (57), Elixir of the Mongoose (56), Elixir of Brute Force (55).
One profession makes 72 of them: Alchemy (72). The rest drop, are sold by vendors, or come from quests.
Source: World of Warcraft: Forever game data and Blizzard's Game Data API. Updated with each game build.