https://www.nootropedia.com/dmae/
Summary
Elderly people are becoming an ever growing percentage of the population as medical advances extend the human lifespan. As these people age, different aspects of their cognitive function decline as well, but there are supplements like DMAE that are designed to prevent the symptoms of this age-related decline.
DMAE is structurally similar to choline, but has one less methyl group. This creates different properties that are said to improve memory and reduce signs of aging in the brain. While not statistically significant, there is some evidence to suggest DMAE can help treat symptoms of Alzheimer’s disease [1].
DMAE supplements are not well absorbed into the brain and this is one of the reasons most people choose to use centrophenoxine instead.