You might not think much about your urine, but it can hold important clues to your health. Urine is produced when your kidneys filter waste and extra water out of your blood. The waste travels to your bladder, which holds the urine until you’re ready to use the bathroom. Then the bladder muscles contract, sending urine out through a tube called the urethra.
This process is important. When you don’t urinate regularly, waste and fluid can buildup to unhealthy levels in your body. Every day your kidneys can produce 1 to 2 quarts of urine.
Urine gets its color, which is typically yellow, from a pigment called urochrome. Lighter colored urine is more dilute, whereas darker urine contains less fluid. Very dark urine could be a sign that you’re dehydrated.
If your urine doesn’t fit within this color scheme, don’t panic. A lot of things can change urine color, including the foods and dyes you eat or the medications you take. For example, beets and berries can turn urine red. Depending on which medicine you take, your urine can turn a rainbow of colors, from yellow to red to blue.
Certain colors, however, can indicate a problem. A red or pink hue could be a sign of blood in the urine. Brown urine may indicate something as simple as a new medicine, or it could be a sign of a more serious condition.
Brown urine may be caused by your food choices, medications, or health conditions.
Some foods may turn urine brown if you eat enough of them. These include:
- fava beans
- food colorings
Conditions and Diseases
Conditions and diseases that can turn urine brown include:
- bleeding in the urinary tract
- hemolytic anemia, a condition in which red blood cells are destroyed
- kidney disorders
- liver disorders, such as hepatitis or cirrhosis
- porphyrias, a group of rare, inherited conditions that affect hemoglobin, the oxygen-carrying protein in blood
- melanoma, a type of skin cancer
- urinary tract infections
Medicines that can make your urine darker include:
- antimalarial drugs like chloroquine (Aralen) and primaquine
- antibacterial drugs, such as furazolidone (Furoxone), metronidazole (Flagyl), and nitrofurantoin (Macrobid)
- iron supplements
- laxatives that contain cascara or senna
- levodopa, which is used to treat the symptoms of Parkinson’s disease
- methocarbamol (Robaxin), a muscle relaxer
Additionally, muscle injury caused by intense exercise, injury, or chemical means can rhabdomyolysis. This can cause a substance, myoglobin, which turns the urine brown or pink, to be released.
What to Do
If you notice that your urine is brown, a good first step is to drink more water to rule out dehydration as the culprit. You should also think about the foods you’ve eaten and the medicines you’ve taken. If you’ve eaten a food or taken a medicine known to tint urine brown, you’ve likely found your cause. If not, be on the lookout for other symptoms. For example, if your urine is dark brown and you also notice a yellowing of your skin and eyes, see your doctor. These could be signs of a liver problem.
When you visit your doctor, they will do urine tests to look for health problems that could be affecting your urine color. These include tests to see whether the kidneys are filtering normally and tests to look for urinary tract infections. Your doctor may also do blood tests. Once you know what’s to blame for the color change, you can stop eating the offending food, switch medications, or treat the condition involved.