Health Item

Throughout the Resident Evil megaseries of games, multiple items have been introduced that can be used to regain onces health.

Herbs

 * Blue - cures basic poisons.
 * Green - heals injuries.
 * Red - does nothing on its own, but can multiply the effects of the Green when mixed.
 * Yellow - can increase ones hitpoints.

Pills

 * An average Anti-viral pill can halt the spread of the t-virus for a short time. The Large pill on the other hand, can halt it for much longer.

Other
In Resident Evil 4, Black Bass can be caught early in the game. Normal sized Bass regain around half of your health, while the Black Bass (L) returns you to full health.