A new study has found that daily intake of Vitamin B can combat memory loss in old age and even help protect against Alzheimer's disease.
More than 250 people took part in the study, at Oxford University, including people with mild cognitive impairment who were aged 70 years or older.
They were given vitamin B, found naturally in food such as beans, meat, wholegrains and bananas, or a placebo over a two-year period.
Taking the food supplement appeared to help maintain mental processes, such as planning, organising and recalling information.
The researchers found that people taking the pill had lower levels of a brain protein known to lead to a rise in the risk of dementia.
They found that it also slowed mental decline in older people who have slight problems with their memory.
The research suggests that dementia could be treated with a food supplement rather than by taking complicated medicines.
"The findings from these two reports should be of interest to clinicians," the Daily Mail quoted Carrie Ruxton of the Health Supplements Information Service as telling the Daily Express.