Stem Cell is an unlockable trinket in The Binding of Isaac, added in the Afterbirth+ DLC.

Traveling to a new floor heals 50% of Isaac's empty Red Heart and Bone Heart containers. Must heal a minimum of half a heart.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this trinket for the new Repentance+ (Online Co-op) DLC, check this page instead.

Defeat Ultra Greedier as Samson.

The following special synergies and interactions for Stem Cell have been documented.

* Note that not all possible synergies and interactions are listed here.

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