|The following is based on Fallout 3 cut content and has not been confirmed by canon sources.|
Protect what's important. With the Gray Matters perk you'll receive 25% less damage when hit in the head.”
Initially, it was to reduce damage to the head by 25% but due a bug, it is significantly higher.
Behind the scenes
- The term "gray matter" is used for one of the two major components of the central nervous system (along with white matter).
- Although the description for this perk states that it will reduce head damage by 25%, the effect of the perk instead reduces head damage to 25%, or in other words a 75% reduction in head damage.