Imagine the crisp, refreshing sip of lemon-infused water gliding down your throat, its subtle tang awakening your senses while quietly aiding your body’s natural filters. At 105, Dr. Shigeaki Hinohara, Japan’s legendary longevity physician, emphasized hydration as a cornerstone of vitality, often turning to simple, nutrient-rich drinks to nurture the kidneys. Proteinuria—excess protein leaking into urine—signals kidney strain, often from diabetes or hypertension, and affects millions after 40. While no drink works “quickly” or “heals” overnight, research suggests certain beverages may support kidney function and potentially ease proteinuria over time by promoting hydration, curbing inflammation, and balancing electrolytes. Curious about the top 10? We’ll count down evidence-backed options, each with a story and tips. But first, a vital note: these are supportive ideas, not cures. One common pitfall? Overloading on potassium-rich drinks without guidance. Let’s explore how to sip smarter.