By 1972, at the age of 77, he was completely bedridden from a degenerative neuro-muscular disease believed to be Parkinson's Disease.[3] He died thirteen years later, unable to improve his own health despite many attempts. His contemporaries were shocked to see him unable to walk, speak normally, or write. Most of his subsequent books were dictated in a whisper. His mind remained sharp, however, and he continued his involvement in Dr Shelton's Health School (now the seventh organization under that name).
It's exactly what I said, diagnosed with Parkinson's at age 77 and died a slow death years later, bedridden. Fasting unable to help.