Health

Summary
Health: The player in Halo:CE has a limited, non-regenerating health bar, which can be fully restored by picking up health packs; it is represented by the segmented blue rectangles in the graphic at the right. Running completely out of health will result in death, but having lower health does not impede player actions. A player's health can only be reduced if his/her shields have failed. With five bars left, another hit can turn them yellow. When there are two left, they are yellow or red. If the player's health is down to one bar, the sound of a heart beating can be heard.

In fact, you have ten 'divisions' or 'fractions' of health in Halo 1, rather than the eight that most people think. They are:
 * 8 blue
 * 7 blue
 * 6 blue
 * 5 blue
 * 5 yellow
 * 4 yellow
 * 3 yellow
 * 2 yellow
 * 2 red
 * 1 red

Contrary to popular belief, there is a small amount of health in Halo 2. It recharges with the shields as the MJOLNIR armor used in this game injects Biofoam into the user, which heals injuries faster. It also appears that the shield block in in the shield gauge reflects your state of health by a slight change in color.

The health system in Halo 3 is a bit more complicated. Bungie has defined a player as having 115 hit points, 45 body (health) points and 70 shield points. After a player is damaged, their health will begin to slowly regenerate after 10 seconds without taking damage. Health regenerates at 9HP/second, taking about 7.75 seconds to recharge from the brink of death. If you are almost killed but recharge your shield, this does not guarantee safety, as your health is independent. This information was gathered from a Bungie weekly update on 2/8/08.

Health packs
A single health pack will fully restore the player's health, but does not regenerate shields. Health packs are only present in Halo: Combat Evolved, as there is no use for them in any other game.