A study published in The Lancet, one of the world’s leading medical journals, called dementia “the greatest global challenge for health and social care in the 21st century.” The study, conducted by The Lancet Commission on Dementia Prevention and Care, noted that 50 million people have dementia worldwide — and that the number is expected to triple by 2050. The commission’s purpose was to provide recommendations for prevention and management of dementia. The need ...