Why is urine yellow, and why does it come out darker if I have had nothing to drink in a while?

Answer 1

Urine contains a an ammonia based compound known as urea which is yellow in color. Urea is an organic compound of carbon, nitrogen, oxygen and hydrogen, with the formula CON2H4 or (NH2)2CO.
The urine gets darker when it is concentrated and will look white when you drink a lot of water which dilutes the urea.
It is advisable to always drink enough water so that the urea does not crystallise in the kidneys forming 'kidney stones' whish are very painful.
So go ahead and enjoy a glass of water!

Answer 2

Actually, if you're drinking a proper amount of water, it should only have a pale yellow tint or be outright clear. The more and darker colored your urine, the more concentrated the urea (the icky stuff filtered out of your blood) is. The urea is stored in your kidneys as crystals, which dissolve into the water you pass as urine. Darker urine means the urea was more heavily concentrated and you need to drink more water.

Answer 3

Robin J. Sky and SAREK are right.

Except that normal healthy kidneys SHOULD NOT HAVE nitrogenous waste (urea) in CRYSTAL form. Or else we'd be peeing like birds, reptiles & certain fish -- pee & poop in the same solid clump.

To maintain bodily functions, you constantly produce a relatively constant same amount of nitrogenous waste (yellow). And use up the same amount of water (perspiration, etc).

When you drink less, your body is trying to keep its solutions (ions, molecules, etc) at the same concentration. And how can it save some water? By throwing out less water in urine. Thus darker urine when you drink less water.

Answer 4

Because you system is not being flushed out as normal. Water (urine) that passed through more often will lighten the more you use the bathroom. Urine removes toxins out of the body as well and the build up of urine may be darker because your kidneys are not being flushed out. Just like pipes if you flush them regularly they don't have much rust build up and if you do not flush them often when you do finally use them them have rust in the water that you can clearly see. I hope this helps you.

Answer 5

The color of urine is dependant on the amount of chemical waste in it. Drinking a lot of fluid rapidly, will flush the kidney waste out into your urine. The first load you eliminate will be colored, the next will contain less color and so on until you stop drinking and pause for the night.
Food, vitamins, juice will all add to the chemical waste saturation in the urine.

Answer 6

You have a greater sodium concentration in the medulla of your kidney when dehydrated and so water molecules are pulled back into the kidney (in the loop of Henle and the collecting duct) via osmosis. The yellow colouration is due to a greater presence of urea (or less presence of water) in your urine.

Desert animals have massive 'loops of henle' so they can re-absorb any water in their urine. They must have really yellow wee.

Answer 7

the major reason why the urine yellow is that those red blood cell that die come-out with bad water in the body systems as a waste products from the boy. hence the urine become yellowish in colors

Answer 8

the urine goes yellow due to Heat on in ur body. The water keep ur Body temperature cool. If u don't drink water for a time than ur body temperature go up, as result the urine colour change to Dark yellow.

Answer 9

Your kidneys are like a reycling plant and extract all of the waste products that are on your blood. you will possibly desire to have a solid throughput of water to maintain those waste products dilute. in case you substitute into dehydrated, the concentration point will strengthen and the waste salts and minerals on your urine can worsen the lining of your urinary device, alongside which incorporate your urethra. If it nonetheless occurs once you drink lots of undeniable water (lots = better than a gallon an afternoon), you probable have a uriniary tract an infection. in case you drink sweetened carbonated beverages, like Coca Cola, you will possibly desire to cut back the quantity or decrease them out all mutually. Cranberry juice is powerful to your urinary device.

Answer 10

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