| ||For yeast as it appears in Fallout: New Vegas, see Yeast (Fallout: New Vegas).|
- Yeast can be found almost everywhere in Point Lookout, and sometimes also on swampfolk.
- Can be found in graves.
- 5 in Calvert Mansion.
- 3 in the mansion's panic room.
- 3 in the Ark & Dove cathedral.
- 3 in the Chinese Intelligence bunker.
- 3 in the burned-out basement.
- 3 in the medical tent.
- 3 in Blackhall Manor.