control protein intake because of their stage of kidney disease.
One person may need more potassium.
Another may need to restrict it.
This is why kidney disease requires individualized care.
Blood tests, medications, kidney function, nutritional status and other health conditions all matter.
## The Bigger Picture
The kidneys are often called the body’s filtration system, but that description doesn’t go far enough.
They are also regulators.
They help determine how much water stays in the body.
They regulate electrolytes.
They influence mineral metabolism.
They help maintain acid-base balance.
They contribute to red blood cell production.
And through all of these functions, they help create the conditions muscles need to work.
When kidney function deteriorates, the effects can spread throughout the body.
Muscles may become weaker.
Exercise can become more difficult.
Cramps may develop.
