Urine can have a variety of different odors, and the smell of peanut butter is not a common one. There are several possible reasons why a person’s urine might smell like peanut butter, and it is important to consult a healthcare provider if you are experiencing this symptom.

One possible reason for urine that smells like peanut butter is the presence of a rare genetic disorder called Maple Syrup Urine Disease (MSUD). MSUD is a rare inherited disorder that affects the body’s ability to break down certain amino acids, which are the building blocks of proteins. When the body is unable to break down these amino acids properly, they build up in the body and are excreted in the urine, giving it a sweet, maple syrup-like odor. In severe cases, the urine may also have a peanut butter-like smell. MSUD is a serious condition that requires prompt medical attention, as it can be life-threatening if left untreated.

Another possible cause of urine that smells like peanut butter is the presence of a rare type of kidney stone called a struvite stone. Struvite stones are made up of a combination of magnesium, ammonia, and phosphate, and they are more common in people who have urinary tract infections. Struvite stones can cause a variety of symptoms, including abdominal pain, blood in the urine, and changes in the odor and appearance of the urine.

It is also possible that the smell of peanut butter in the urine could be due to the presence of certain medications or supplements in the body. Some medications, such as penicillamine, which is used to treat rheumatoid arthritis and Wilson’s disease, can cause changes in the smell of urine. In addition, certain supplements, such as high-dose vitamin B-6, can also cause changes in the smell of urine.

In summary, urine that smells like peanut butter can be caused by a variety of factors, including rare genetic disorders, kidney stones, and certain medications or supplements. If you are experiencing this symptom, it is important to consult a healthcare provider for proper diagnosis and treatment.