Blood Bag is an unlockable passive item in The Binding of Isaac.

+1 full Red Heart container.
+0.3 speed.

Refills 4 red heart containers.

Can drop as a final payout from a Blood Donation Machine.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.

Use a Blood Donation Machine 30 times.

Blood Bag can be found in the following item pools:

The following tags are applied to this item:

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Blood Bag

• Abyss: x1 locust 1x Isaac's damage

• Check out the item description on the external Isaac Wiki.