Yes, it is entirely possible to live a healthy, active life with just one kidney. Many individuals are born with a single kidney—a condition known as renal agenesis—or may lose one due to medical conditions, injuries, or by donating a kidney. In most cases, the remaining kidney adapts by enlarging and increasing its filtration capacity to compensate for the loss, effectively performing the work of two kidneys.

However, living with one kidney does come with certain considerations. There's a slightly increased risk of developing high blood pressure, proteinuria (excess protein in the urine), and reduced kidney function over time. These risks are generally low, especially if the remaining kidney is healthy, but they underscore the importance of regular medical check-ups to monitor kidney function.

To maintain optimal health with a single kidney, it's advisable to adopt a kidney-friendly lifestyle. This includes staying well-hydrated, following a balanced diet low in sodium and processed foods, moderating protein intake, and avoiding substances that can harm the kidneys, such as excessive NSAIDs and alcohol. Regular exercise and maintaining a healthy weight also contribute to kidney health.

In summary, while living with one kidney requires some lifestyle adjustments and proactive health monitoring, most individuals lead normal, healthy lives without significant limitations. With proper care and regular medical supervision, the single kidney can function effectively for a lifetime.

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