Kidneys are bean-shaped organs, about the size of fists, located on either side of your spine near the middle of your back. These amazing organs help keep you healthy in so many ways—which is why kidney function is so crucial to your overall well-being.
Did you know? Most people are born with 2 kidneys, but you only need 1 to live a healthy life.
Your kidneys remove excess body water and waste products 24 hours a day. The excess body water and waste products are removed from your body as urine. However, kidneys don’t just clean your blood, they also play other vital roles in your overall health. On a daily basis, your kidneys work to:
Kidney parts and functions
For each kidney:
What can I do to keep my kidneys healthy?
You can protect your kidneys by living a healthy lifestyle. Here are some tips that may help keep your body healthy, including your kidneys:
Make physical activity part of your routine
Be active for 30 minutes or more on most days. Healthy adults should aim for at least 150 minutes (or 2.5 hours) of physical activity each week. Pick activities that you enjoy, set your fitness goals and start slowly.
Ask your doctor for the type and amount of physical activity that is right for you, especially if you have a health problem or an injury.
Aim for a healthy weight
Regular physical activity can improve your health, mood and may help manage your weight. If you are struggling with your weight, a healthy eating plan and regular physical activity may help you lose weight and keep it off over the long term.
Drinking a sufficient amount of fluids on a daily basis is an important part of kidney health. Every person is different, and the right level of fluid intake will depend on many factors and conditions. The color of your urine may tell you if you are drinking enough fluids. You should aim to produce urine that is straw colored or lighter. If it is darker, you may be getting dehydrated and you should drink more fluids.
Getting enough quality sleep at the right times helps your brain work properly and may help protect your mental health, physical health, quality of life, and safety. The amount of sleep needed may vary from person to person and may change over the course of your life. Sleeping when your body is ready to sleep is also important, but you can aim to have 7 to 8 hours of sleep each night.
Ask your doctor these questions 
The sooner you know about your kidney health, the sooner you can get treatment to help protect your kidneys. Ask your doctor the following key questions about your kidney health during your next medical visit.
Other important questions
When kidneys stop working
Kidney failure occurs at stage 5 of kidney disease. Fortunately, there are different treatment options that can take the place of some kidney functions and, along with medication and care, can help a person live longer. Damage from kidney disease is irreversible, so the earlier it is diagnosed and action is taken, the better.