Why does urine turn yellow after taking vitamin C?

Yellow urine after taking vitamin C may be caused by drug metabolism, urinary tract infection, acute glomerulonephritis, etc. Details are as follows:

1. Drug Metabolism

After taking vitamin C, yellow metabolic byproducts are produced during metabolism in the body and excreted through the kidneys into the urine, causing the urine to appear particularly yellow. This is a normal phenomenon that resolves once the medication is discontinued. No treatment is necessary if there are no other unusual symptoms.

2. Urinary Tract Infection

While taking vitamin C, infection by pathogens may trigger a urinary tract infection. Poor personal hygiene can also contribute to the development of such infections, leading to symptoms including dark yellow urine, frequent urination, urgency, and painful urination. Medications such as cefixime granules or levofloxacin hydrochloride capsules may be taken as directed by a physician for symptom relief. Additionally, maintaining good personal hygiene, drinking plenty of water, and urinating frequently are recommended.

3. Acute Glomerulonephritis

Living for prolonged periods in poor environmental conditions may lead to hepatitis C virus infection, and individuals with congenital kidney insufficiency may develop acute glomerulonephritis. This condition can result in symptoms such as edema, respiratory tract infections, reduced urine output, and yellowish urine.

In addition to the above conditions, acute kidney injury, hepatocellular jaundice, and chronic renal failure may also cause this phenomenon. Seek prompt medical attention if symptoms are severe. Patients should drink adequate water during medication use and maintain good hygiene, which may aid recovery. A low-salt diet and increased intake of vegetables and fruits are also recommended in daily life.