Of course, any of these features can also benefit younger drivers who favor function and comfort over sheer flash and fashion.

FORBES: Best New-Cars (And Features) For Senior Drivers

SaaS businesses, resource-intensive software, and any function that relies on uploads and downloads will reap an immediate benefit.

FORBES: Move up http://i.forbesimg.com t Move down

While a 2006 French study found that people with diets high in beta-carotene had a slower decline in lung function over an eight-year period, heavy smokers and drinkers may not benefit.

CNN: Vitamin E may protect lungs

Fish oil "seems to be healthy in general, and maybe for other things it's helpful, but it doesn't benefit cognitive function in a person with Alzheimer's, " says Ferris, who was not involved in the study.

CNN: Fish oil ingredient doesn't slow Alzheimer's