Rotten Grandgrapes is an Item in Dragon's Dogma.
"Grandgrapes in better days. A meal this foul is sure to ravage the bowels. However, it can restore the same amount of health as a during herb."
- Found randomly around abandoned locations and ambushed carts all across Gransys.
- Also obtained by degrading Grandgrapes in your inventory for 4-5 in-game days.