Today's Globe: eating and the brain, gingko and dementia, stem cells and trachea transplant, diabetes costs

A growing body of research is erasing any doubt that eating is as much about our brains as our stomachs.

The dietary supplement ginkgo, long promoted as an aid to memory, didn't help prevent dementia and Alzheimer's disease in the longest and largest test of the extract in older Americans.

A Colombian woman has received the world's first tailor-made trachea transplant, grown by seeding a donor organ with her own stem cells to prevent her body rejecting it, an international research team reported today.

As diabetes rapidly becomes one of the world's most common diseases, its financial cost is mounting, too, to well over $200 billion a year in the United States alone, says a study released yesterda