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Spoilers for Books 1–8
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All eight books included

Consumable · Introduced in Book 1
Rev-Up Immunity Smoothie
The Rev-Up Immunity Smoothie temporarily protects against communicable diseases and conditions that drain health. Carl finds its recipe and discontinued production equipment before the boss fight.[1]
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Prevention and side effects
The smoothie prevents new qualifying conditions; it does not cure everything the drinker already has. It also causes Buzzed, giving three Charisma, taking away one Dexterity and applying Shaky Cam and Truth Serum.[2]
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History
Book 1
Dungeon Crawler Carl
Carl finds the recipe with the discontinued equipment and suspects that making the drink is part of the intended preparation for the boss.[1]
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Book 1
Dungeon Crawler Carl
Carl and Donut drink from the ten-dose batch and become Buzzed. The smoothie later protects against Vigorous Measles, but it does not remove Carl’s existing Taint, which still stops him from healing.[2]
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Sources
References are to Matt Dinniman’s novels. Book links open our recap guides.
- Dungeon Crawler Carl, Chapter 33.
- Dungeon Crawler Carl, Chapter 34.