Tonics are passive abilities that provide various bonuses, from combat enhancements to utility improvements. They are purchased with ADAM at Gatherer's Gardens and equipped in limited slots. There are three categories: Physical, Engineering, and Combat. Examples include Wrench Jockey (increased melee damage), Hacker's Delight (health/EVE from successful hacks), SportBoost (movement speed after melee kills), Drill Specialist (increased drill damage), EVE Saver (reduced Plasmid cost), Proud Parent (increased damage for allied Big Daddies), Headhunter (increased headshot damage), and Damage Research (bonus damage after researching enemies). Carefully select Tonics that complement your chosen build and playstyle. You can purchase additional Tonic slots at Gatherer's Gardens to equip more passive abilities.
