Effect stacking

Many effects in the game have two parameters: value and duration. Value is the intensity of the effect and duration is the amount of time for which it remains active.

An example of an effect with both parameters is the one caused by consuming willow bark: Regenerate 3 HP per minute for 30 minutes. In this case "3" is the value and "30 minutes" is the duration.

If the same effect is applied to you multiple times, one of two things happens, depending on how the effect stacking is defined:

Value stacks
The value of the effect is multiplied by the number of times the effect was applied. For example, if you consumed 2 willow bark, you would regenerate 6 HP/min for 30 minutes, because this effect states that value stacks.

Duration stacks
The duration of the effect is multiplied by the number of times the effect was applied. For example, if you consumed 2 lobster with butter sauce, you would gain 10% armor for 20 minutes, because this effect states that duration stacks.