Why does urine turn reddish after eating dragon fruit?
Nov 29, 2024
Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Consuming pitaya (dragon fruit) may cause reddish urine due to several possible factors, including natural pigments present in the fruit, excessive consumption of pitaya, hematuria (blood in urine), urethritis, or cystitis. Betacyanin, a pigment found in pitaya, is not easily fully broken down or absorbed by the human body. As a result, some unmetabolized betacyanin is excreted through the kidneys, leading to urine that appears red or pinkish.
Generally, red or pink urine after consuming dragon fruit may be caused by natural pigments in the fruit, excessive consumption of dragon fruit, hematuria (blood in urine), urethritis, or cystitis. If discomfort occurs, it is recommended to seek medical attention promptly. The specific causes are analyzed as follows:
1. Natural Pigments in Dragon Fruit
The betalain pigment in dragon fruit is not easily completely broken down and absorbed by the human body. As a result, some unmetabolized betalain is excreted through the kidneys, causing the urine to appear red or pink. Usually, no special treatment is required. The urine color typically returns to normal within 1-2 days after stopping dragon fruit consumption.
2. Excessive Consumption of Dragon Fruit
If a large quantity of dragon fruit is consumed, a significant amount of betalain may be ingested, exceeding the body's metabolic capacity, which may lead to red-colored urine. Reducing dragon fruit intake and drinking more water can help facilitate pigment metabolism.
3. Hematuria
Strenuous exercise may cause temporary hematuria, which, when combined with the pigment effect of dragon fruit, can intensify the redness of urine. Muscle soreness after exercise may also occur. Appropriate physical exercise can enhance cardiopulmonary function and improve metabolic capacity.
4. Urethritis
Urethritis is caused by infection of the urethra by pathogens and may result in hematuria. When this occurs simultaneously with the effects of dragon fruit pigments, the urine may appear more red, and symptoms such as frequent urination and pain or irritation at the urethral opening may occur. It is recommended to follow medical advice and use medications such as levofloxacin hydrochloride tablets, norfloxacin capsules, and Re Lian Qing granules for treatment.
5. Cystitis
Obstruction of urine flow, low immunity, and other factors may trigger cystitis, which may present with hematuria. When this occurs in combination with dragon fruit pigments, the urine may turn red, and symptoms such as urgency and pain during urination may occur. Patients should follow medical advice and use medications such as cefdinir dispersible tablets, Yin Hua Mi Yan Ling tablets, and nalbuphine hydrochloride injection for treatment.
In daily life, it is advisable to avoid consuming excessive cold, spicy, or strongly stimulating foods to prevent irritation to the digestive system and to maintain normal function of the urinary system.
