Health

From BioShock Wiki

Health is a basic representation of Jack's physical wellbeing. It is shown by a red bar with a plus in front of it, also shown is the amount of First Aid Kits Jack is carrying with him. Jack loses health every time he's hurt. Damage can be caused by Splicers, falls, fires, etc. Jack's maximum amount of health can be increased by completing research levels on Little Sisters, and purchasing Health Upgrades from Gatherer's Gardens.

On the Easy and Normal difficulty, Jack won't die instantly from a fatal injury; instead his health will be reduced to 1, and he'll only die if he takes 1 more hit. For example, if there's only 20 health, and 30 damage is inflicted, instead of ending up with -10 health (i.e. dead), he'll still be alive, with 1 health.

[edit] Replenishing Health

There are various means to replenish Jack's health. Use (hacked) Health Stations, First Aid Kits, and consumables to replenish health.

When equipped with the Bloodlust physical tonic, Jack will replenish a small amount of health and EVE when he strikes someone with the Wrench.