A combat assistance product developed by Dr.A. This will help your HP to take attack from zombies in the battle. By possessing this item in your inventory, your health will upgrade to a certain level varying on the grade of the item.
HP Supplements can be obtained randomly by opening Dr. A's Trunk after Zombie Scenario Re:boot. The grades of HP Supplements acquired varies on the grade of Dr. A's Trunk. For instance, opening Low Grade Dr. A's Trunk will give you a Low Grade HP Supplement.