This is a great review or 'State of research' article on both AD and PD. It emphasizes importance of getting both under control as a public health issue, so it seeks to find common ground. There is a look again at the role of iron.
Ultimately, it looks like our best defense at this point is calories restriction and exercise. I will say that I took three days "off" from exercise and noticed a rebound of symptoms and felt really crappy. This also gibes with others who have noted significant reduction of symptoms and lowering of med dosages with vigorous, daily exercise.
The best part is the article is free full-text.
Neurodegenerative Diseases: Exercising toward Neurogenesis and Neuroregeneration
Happy Thursday!
Laura