Why is urine yellow?

Our bodies use nutrients from the foods we eat. But digestive-related processes also create what we call a "by-product". And here, a new chemical was created.

Some of the body's by-products are waste and our bodies have smart waste disposal systems to remove them.

Some waste will come out of the body through the feces. Waste that is soluble in water will go out through urine. We call this "waste water soluble."

And the part of the body responsible for making urine is the kidney. They are shaped like kidney beans.

A delicate balance

The kidneys work around the clock to make sure the body always balances water, salt and chemicals and doesn't have too much water-soluble waste.

Kidneys have special filters that help to sort out useful substances with waste. The kidney is also responsible for transporting water-soluble waste from the kidneys, down to two special ducts called ureters and into the bladder (located near the genitals).

If your urine is light yellow, it means you drink lots of water.

When the bladder is full, it sends a message along the nerve to the brain, making you feel like you need to urinate.

So . why is urine yellow?

One of the water-soluble wastes that the kidneys put into urine is the chemical called urobilin and it is yellow.

The color of urine depends on the amount of urobilin and the amount of water in it.

If your urine is light yellow, it means you have been drinking a lot of water and have lots of water in your urine. We call this " hydrated".

If urine is dark yellow, it means less water and relatively high levels of urobilin. That means you have been drinking enough water or you may be dehydrated.

What is drinking too much water and how to drink enough water?

When you don't drink enough water, your kidneys receive a message from your brain to try to keep more water in your body. You will also start to feel thirsty.

If people are unable to drink water (for example, by vomiting), they may need water directly into the blood. At that time, you go to the doctor and they will transfer water to your body (a bag of saline is put into your blood through a needle in your arm).

If you drink more water than your body needs, your body will "speak" with the kidney filters to remove backup water. Your urine will then become paler.

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