Why you should be brushing your teeth with your left hand to prevent dementia

Health Why you should be brushing your teeth with your left hand to prevent dementia By Patrice Peck Published June 24, 2026, 1:02 p.m. ET See more of our coverage in your search results. Add The New York Post on Google The secret to a better brain workout might already be sitting in your bathroom. That matters as more and more people experience memory concerns. About one in 10 adults ages 45 and older report worsening memory loss or cognitive decline, according to the CDC, and many more are caring for someone experiencing cognitive challenges. There are plenty of brain-training apps designed to challenge the mind, but there’s also another simple trick that costs nothing and takes about two minutes: Brushing your teeth with your non-dominant — in most cases, your left — hand.

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