Urine Changes After Eating Pineapple: What You Need to Know - Family Medicine

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Hello, doctor.
After eating pineapple yesterday, I had to use the restroom, and afterward, I noticed a faint, pungent smell of pineapple in the bathroom.
Three years ago, I had blood tests for liver, kidney, and blood sugar levels, and my doctor said everything was normal.
During high school, about seven years ago, I had a physical examination that showed a weak positive for urine protein.
I was very anxious and went to a large hospital for further testing, where the doctor used various methods to check me and found nothing wrong.
Over the past few years, I have had my urine tested about four times, and everything has been normal.
My fasting blood sugar levels have also been standard for the past two years.
I tend to be quite health-conscious and often worry about my body, fearing that something might be seriously wrong.

Niming, 20~29 year old female. Ask Date: 2023/04/02

Dr. Lin Zhebin reply Family Medicine


Hello: The pineapple-like odor in your urine may be caused by ammonia present in the urine, which is commonly associated with factors such as holding in urine, dehydration, or urinary tract infections, among others.
Additionally, dietary factors could also be a concern, such as garlic, onions, leeks, alcohol, or coffee.
Lastly, it is important to consider other medical conditions, such as diabetes.
In summary, it is advisable to monitor for symptoms such as fever, painful urination, or increased frequency of urination, which are similar to those of a urinary tract infection.
Also, pay attention to whether you have consumed any of the aforementioned foods that could affect the odor of your urine.
If you experience any of the mentioned discomforts or if the odor of your urine persists without improvement, it is recommended to seek medical evaluation and treatment.

Reply Date: 2023/04/02

More Info


When you consume pineapple, it is not uncommon to notice changes in the odor of your urine. This phenomenon can be attributed to the presence of certain compounds in pineapple, particularly bromelain, which is an enzyme that can affect the way your body metabolizes food. Additionally, pineapple is rich in vitamin C and other organic acids, which can also contribute to the distinct smell of your urine after consumption.

The scent you described as "pungent" is likely due to the breakdown of these compounds in your body. When you eat foods that are high in certain sugars, acids, or other volatile compounds, these can be excreted through your urine, leading to noticeable changes in its odor. This is generally harmless and is a normal response of your body to dietary intake.

Regarding your concerns about kidney function, it is reassuring to hear that you have had multiple tests over the years that have returned normal results. The presence of protein in urine, known as proteinuria, can be a sign of kidney issues, but since you have undergone thorough testing and have been cleared by medical professionals, it is likely that this was a transient finding or related to other benign factors, such as dehydration or temporary stress on the kidneys.

Your anxiety about your health is understandable, especially given your history of health checks and your tendency to be vigilant about your body. However, it is important to remember that occasional changes in urine odor, especially after consuming certain foods, are typically not a cause for concern. If you continue to experience unusual symptoms or if you have any new health concerns, it would be prudent to consult with a healthcare provider for further evaluation.

In terms of nutrition, maintaining a balanced diet is crucial for overall health, including kidney function. Foods like pineapple can be beneficial due to their high vitamin C content and other nutrients, but they should be consumed as part of a varied diet. Staying hydrated is also essential, as it helps the kidneys filter waste more effectively and can dilute any strong odors in urine.

If you are looking for ways to manage your health anxiety, consider incorporating stress-reducing practices into your routine, such as mindfulness, yoga, or regular physical activity. These can help alleviate some of the worries you may have about your health. Additionally, keeping regular appointments with your healthcare provider for check-ups can provide peace of mind and help you stay informed about your health status.

In summary, the changes in urine odor after eating pineapple are likely normal and not indicative of any underlying health issues, especially given your history of normal kidney function tests. Continue to focus on a balanced diet, stay hydrated, and consult with your healthcare provider if you have any ongoing concerns.

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