There are two important stats in Graveyard Keeper: energy and health. Health is displayed only during combat and when something attacks you. Energy is displayed all the time - the majority of interactions in the game require it. Without energy you can't collect resources, craft tools and complete quests. The only thing that you can do without energy is to walk and have conversations with the NPCs.
Potions can be received as a reward from various NPCs or you can brew them yourself by using Alchemy workbench. This object is unlocked on the technology tree. You can place it in the church basement.
Potions allow you to replenish both energy and health. Use a Heal Potion to restore your entire health - you can make it by combining 1 Life Powder and 1 Health Solution. Drink Energy Potion to restore 30 energy points.
Sleep is the best way to regenerate both health and energy. However, your character can sleep up to half a day if you've used up all your energy. Pay attention to when your character is going to sleep and wake him up at a reasonable hour so he won't sleep through the majority of the day.
Food only restores energy. You can cook it yourself or you can purchase meals in The Dead Horse. Check one of the pages in our guide to learn about various dishes and how much energy you can restore with them.
You can also replenish your health and energy by eating raw materials collected in the game, such as mushrooms, berries, honey and flowers. They grow throughout the whole area of the town.
Edible mushroom - subtracts one point of health but add two points of energy,
Honey - regenerates three health and fifteen energy points,
Red/yellow/white flower - adds three energy points,
Blueberries - regenerate two energy points.