My Vision is Now Clear with Essiac Tea Guillermo Navarro shares the benefits he has received from drinking Essiac tea in Spanish. He's having success with my prostate cancer treatment. His prostate-specific antigen (PSA) level has dropped from 20 to 15 in just 5 months. It has relieved muscle cramps and cleared his vision. Here is the translation if you want to read it in English: Hello, my name is Guillermo Navarro. I'd like to share with you the benefits I've received from drinking Essiac tea.