Sándor has been diabetic for 53 years. As a result, the blood vessels in his eyes were damaged completely. He can only see out of one eye and only some lights.
The blood vessels in his feet were also damaged which resulted in ulcers forming regularly on his toes. Doctors referred him for an operation, as they believed amputation was necessary. However, Sándor refused the operation and after using C-peptide, his blood sugar levels decreased, so he needs less insulin, and the ulcers began to heal spectacularly well.