Guthix rest

Guthix Rest is a tea, but it functions similar to a potion. It is made during the One Small Favour quest from 2 Guam leaves, a harralander, and a marrentill. To make it, heat a bowl of water on a range. Use the heated water on an empty tea cup and add the herbs. Making Guthix rest gives a total of 59.5 Herblore experience.

After One Small Favour is completed, the tea can still be made. It still gives Herblore experience and has several useful effects. It cures poison, restores some run energy and boosts max hitpoints by 5 if you are at full health.

When first released, there was a bug that caused the tea to restore all of the user's health. The bug was quickly fixed.