I appreciate taking into consideration a fish tank.

You have to clean the filtration system every few months because even that needs tending to once it does its job over a certain amount of time

While taking care of a fish tank overtime you will have to add water, not because you took the water out yourself, not because the fish took the water out, but because overtime it evaporates and you have to replenish it if you want to continue to have a healthy environment for your fish

The human body is no different. You will always have to replenish the moisture within yourself, you will always have to clean your filtration systems to make sure that they can function at their best ability. To understand the second we deny those responsibilities of cleaning our filtration system and replenishing the moisture in our body, that is the moment we begin to die.