Today in the News you may hear about brain health to help protect against Dementia from Alzheimer's. However, these are all relevant to MS too
There are 9 things mentioned that may help 

The nine risk factors include:
Potential risk factors:

We all know that an active body and and active brain, helps protect against ill-health, 

If I asked you to think of things that promote brain health, you could write this on the bad of a fag-packet, which you should throw away as you shouldn't be smoking.

The interesting ones to me are hearing loss but this makes sense because hearing and vision are essential part of sensory input that is going to keep your brain active making new connections.

However, if you look at the list above, many of them are all inter-connected e.g. physical activity, obesity, diabetes.

Please note you can do all the unhealthy things and not get dementia and you can be as healthy as possible and get dementia, the list above are risk factors that are modifiable by life style, adopt them they reduce your risk but do not prevent risk.