Neurodegenerative diseases are in fact quite simple to partially address. As always oxidative stress and mitochondria bioenergetics are the critical factor in the chain leading to neural apoptosis. Anyone can get revolutionary results with e.g Skq1 which is precisely 1000000 times more potent than NAC because it exploit the negative charge of the mitochondria to be attracted to it. But even without taking of mitochondria targeted antioxidants there exist many potent mitoprotectors, see e.g the pictures of saved brain volume in this generic oxys rat simulation (accelerated Aging) https://www.researchgate.net/publication/221738761_Evaluatio... As I often say, the times it takes for scientific knowledge to be used by practitioners is often infinity. In fact that is the general case. We will have to wait for more people to suffer and die because you know running clinical trials is such a 20th century thing