A 74-year-old Taiwanese woman with chronic kidney disease was rushed to hospital after her well-meaning family served her pork rib soup and chicken essence with every meal to help her recover from a cold. The result: potassium levels eight times above normal and a life-threatening heart arrhythmia.
The incident, shared by Taiwanese nephrologist Dr. Lin Xuan-Ren on his Facebook page, unfolded in late August 2025 during a cold snap. What began as a simple cold soon escalated into a medical emergency when the elderly woman started experiencing dizziness, unstable gait, and marked mental deterioration.
The Potassium Nightmare
Upon arrival at the emergency department, physicians discovered the patient’s serum potassium had surged to 8.4 mmol/L—more than double the safe upper limit of 4.5 mmol/L. Her electrocardiogram revealed a condition called junctional bradycardia, an abnormal heart rhythm where electrical signals bypass the heart’s natural pacemaker.
Dr. Lin explained that when potassium levels spike, the heart’s electrical conduction system—which he compared to a sophisticated circuit—begins to fail. The sinoatrial node, atrioventricular node, and ventricles can no longer communicate properly. Forced to rely on backup signals from other cardiac cells, the heart contracts inefficiently, reducing blood flow to vital organs.
“This is not a minor inconvenience,” Dr. Lin warned in his post. “Mild cases cause weakness and dizziness, but severe episodes can prevent blood from reaching the body’s tissues, potentially leading to death.”
Why Love in a Bowl Turned Dangerous
The family’s intentions were pure. Concerned about their elderly relative’s weakened state, they prepared pork rib soup at every meal followed by chicken essence supplements—traditional remedies believed to restore strength during illness.
For healthy individuals, these foods pose little risk. But for patients with chronic kidney disease stage three or higher, the kidneys cannot excrete excess potassium. Each bowl of broth, each dose of essence, slowly built a toxic load in her bloodstream. The patient required emergency dialysis to correct her potassium levels.
Can Kidney Patients Drink Soup at All?
The answer is yes—but with careful ingredient selection and preparation methods. Dietitian Moy Ying-Shan from Hong Kong’s Hong San Hospital offers clear guidance:
- Choose low-potassium vegetables like chayote, carrots, and napa cabbage
- Avoid slow-cooked or “old fire” soups (老火湯), which leach high levels of potassium, phosphorus, and protein from meats, herbs, and leafy greens
- Limit bone broths and meat essences, which are potassium-dense
- Keep portions moderate and season lightly
Four Kidney-Friendly Soup Recipes to Try
For those managing kidney conditions, these low-potassium options provide warmth and nutrition without danger:
1. Chayote and Jujube Soup—Combine two chayotes, one carrot, three dried jujubes, and 150 grams of lean pork (blanched) in 1.5 liters of water. Simmer for one hour.
2. Carrot, Apple, and Longan Soup—Mix one carrot, one apple (cored, skin on), 5-10 grams of dried longan, and optional jujubes in 1.5 liters of water. Simmer for 40-50 minutes.
3. Mustard Green Heart Soup—Add 300 grams of cleaned mustard green hearts and two slices of ginger to 1 liter of boiling water with 50 grams of lean pork slices. Cook until greens soften.
4. Corn and Egg White Soup—Simmer corn kernels in 800 ml water for 15 minutes, thicken with cornstarch slurry, then gently stir in beaten egg whites.
The Broader Lesson
This case underscores a critical gap in public health education: traditional comfort foods can become dangerous for patients with compromised kidney function. As populations age and chronic kidney disease prevalence rises globally—affecting approximately 10% of adults worldwide—families must recognize that even the most loving gestures require medical context.
Dr. Lin recommends that anyone with known kidney disease, diabetes, or hypertension consult their healthcare provider before using nutritional supplements or consuming high-potassium foods. Simple blood tests can reveal whether potassium levels are within safe range.
For the elderly patient in Taiwan, a timely emergency intervention saved her life. But for countless others cooking for loved ones with hidden health conditions, awareness could prevent the crisis altogether.