• Mixed Berries
• Item Level 55Disenchants into:
  Not disenchantable
• Requires Level 45
• Use: Restores 2148 health over 30 sec. Must remain seated while eating.
• Sell Price: 2

Source

Only drops from Ferra the pet of Illyanna Ravenoak in Dire Maul.

Since Cataclysm, they also drop from the Taintred Black Bears in the Blasted Lands and Rabid Shardtooths in Winterspring.

Patches and hotfixes

• Patch 4.0.3a (2010-11-23): Additional sources added. 
  

Patch 1.3.0 (07-Mar-2005): Added 

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB