Dementia affects millions of people worldwide. Its symptoms include confusion, sleeplessness and mood swings. Now, scientists say inability to smell peppermint could be linked to dementia. Researchers tested how your sense of smell is related to the memory-loss illness. 3,000 people, ages 57 - 85, were tested with five different scents. Peppermint Fish Orange Rose Leather 78 percent of subjects correctly named at least 4 out of 5 scents. 14 percent could name 3 out of 5. 5 percent could name 2, 2 per