Mighty Troll's Blood Elixir

Mighty Troll's Blood Elixir is an elixir that periodically restores health for an hour.

Source
This elixir is made by Alchemists with a skill level of 290.

The components are:

Before patch 4.0.3a, the recipe was sold by Rin'wosho the Trader on Yojamba Isle in Stranglethorn Vale. You had to be Honored with the Zandalar Tribe to purchase this recipe.