Supplements like gingko biloba may be used by older Americans to improve brain function, but a new study from the University of North Carolina finds that exercise may also reduce problems with one’s memory.

The researchers used magnetic resonance imaging to study the brains of two groups of adults, one which reported exercising for at least three hours per week for the past 10 years and another that had engaged in fitness activities for less than 90 minutes over the same period.

Images of brains from the more active group closely resembled those of younger adults, the scientists found, including more blood vessels that improved function.

They say that aerobic activity could reduce the decline of brain function linked to memory problems that are caused as arteries in the brain begin to twist and narrow.

Another remedy for limiting memory problems could be supplements that include vitamin B12 according to research at Oxford University.

While "many factors that affect brain health are thought to be out of our control," said lead author Anna Vogiatzoglou, the vitamin was found to reduce brain shrinkage and could "save our memory."