When Nate Boutcher was 22, he found out his kidneys were failing. He wasn’t totally shocked by the doctor’s news, since his dad had suffered from kidney failure throughout Boutcher’s childhood, but the diagnosis still hit him hard. Like most undergrads, he thought he was invincible at the time. “I knew that I had scarring on my kidneys when I was 18, but I didn’t think it would get any worse. When I went in at age 22, I had some swelling, but I thought it was because I needed stronger medicine—but it turned out, I had severe kidney failure,”...