|For the similarly named perk in J.E. Sawyer's Fallout Role-Playing Game, see Snakeeater.|
Yum! Tastes like chicken. You have gained an immunity to poison, resulting in a +25% to your Poison Resistance.”— Fallout description
+25% poison resistance per rank. There's only one.
The perk is functionally useless, as poison is never a major problem in the games.