How can I load a level when health depletes to 0?

I bought a simple health script from the Unity Asset Store, and it’s good except I want it to load a level when the players health depletes to zero. The asset has poison which will deplete a heart and health packs which will add another heart. How can I make it so that when there are no hearts left, the scene reloads the level? Can someone please help me?!

if ( health < 0 )
{
Application.LoadLevel( “NextLevelHere” );
}