X-111 compound

X-111 compound is a consumable item in Fallout 4.

Characteristics
The X-111 compound is an anti-radiation medicine created by Senior Scribe Neriah on The Prydwen.

The player character must give Senior Scribe Neriah 20+ blood samples in the unmarked quest Blood Bank, and then talk to her again. She will give the player character 6 X-111 compounds and will inform them that if they want more they need to bring her more viable blood samples.

Locations

 * 6 Given by Senior Scribe Neriah after giving her 20+ Viable blood samples. Neriah will take all Viable blood samples from the Sole Survivor's inventory and pay 50 caps each.  Speaking to her again and choosing X-111 will award 6 X-111 compound if 20+ Viable blood samples have been turned in since the last time.  To maximize the amount of X-111, drop or store all but 20 Viable blood samples before speaking to Neriah.