Running through these will restore your health or HEV power by a certain amount.

These will charge your heath or HEV power, which restores your game. They are scattered throughout the Black Mesa complex. They have limited amouts of recharging power once you have used it up at that station there is no more. This is around 30 health points or 50 HEV points.

These pools are found outside on the alien worlds, your health will be slowly restored when standing in them. They do no affect your HEV power.

These pods are found inside on the alien worlds, your health will be slowly restored when standing in them. They do no affect your HEV power.

If you have very low health any nearby scientists will give you a health injection.