Lewy body dementia, which results in a progressive decline of one's mental abilities, is among the common types of progressive dementia after Alzheimer’s disease. How common is Lewy Body Dementia? Lewy body dementia or LBD is not at all rare. It affects over 1.4 million people and their families in the United States alone. However, due to how its' symptoms can closely resemble that of Alzheimer’s or Parkinson’s, it often goes undiagnosed. In fact, many doctors are unfamiliar with … [Read more...] about Lewy Body Dementia Affects 1.4 Million Americans