According to Michelle Roberts a reporter from the B.B.C:
"The latest work found that six months of treatment with nicotine patches appeared to improve how well individuals with "pre-dementia" or mild cognitive impairment (MCI) performed on tests designed to assess memory, attention and response times.
After six months of treatment, the nicotine-treated group regained 46% of normal performance for age on long-term memory, whereas the placebo group worsened by 26% over the same time period."
No, I dont recomend non smokers going out and getting on Nicotine. It's expensive, highly addictive, and has a lot of proven negatives. However it's worthy of discussion. Heres the link. http://www.bbc.co.uk/news/health-16467186