Health in League of Legends is your champion’s primary stat. The amount of health determines how much damage your champion can withstand and how long he will survive in battles.
Often the health indicator is indicated using the abbreviation HP or HP (short for Health Point). Starting health varies between champions. The maximum health increases with each level. For example, at level 18, the Gnar champion has a maximum health reserve without artifacts of 1650, and the Alistar champion already has 2347.
Using artifacts you can increase your maximum health or health regeneration. Moreover, each unit of maximum health costs approximately 2.6 gold, and 1 unit of regeneration will cost you 36 gold. These figures are approximate and serve as an example only.