Ron Reagan, son of former President Ronald Reagan, has been an advocate for stem cell research, which holds potential for treating various diseases including diabetes. After his father's death from Alzheimer's, Ron Reagan has actively spoken out on the importance of stem cell research and has called for increased federal funding. He believes that stem cells could be used to treat not only Alzheimer's but also other conditions like Parkinson's disease, diabetes, and lymphoma. His advocacy has brought attention to the potential benefits of stem cell research in treating these serious health issues.