Harvard neurologist Rudolph E. Tanzi, a pioneer in Alzheimer’s research who discovered three genes linked to the disease, is now promoting a holistic lifestyle approach to brain health. Tanzi, 67, and co-director of the Henry and Allison McCance Center for Brain Health at Massachusetts General Hospital, outlined his “SHIELD” plan – encompassing sleep, stress management, social interaction, exercise, nutrition, and learning – in a new report, and credits it with maintaining his own cognitive vitality. The plan, detailed below, underscores a growing understanding of proactive steps individuals can take to protect against neurodegenerative diseases and improve overall well-being.
Long before “brain health” became a buzzword, Rudolph E. Tanzi was reshaping our understanding of it. The Harvard neurologist and co-director of the Henry and Allison McCance Center for Brain Health at Massachusetts General Hospital is renowned for his discovery of three key genes linked to Alzheimer’s disease.
Throughout his 46-year career, Tanzi has authored hundreds of articles in scientific journals that have significantly shaped the modern understanding of neurodegenerative diseases. In 2023, he collaborated with holistic health guru Deepak Chopra to write “Super Brain,” challenging conventional thinking about the limits of the human mind.
The book argued that the brain’s potential for growth and creativity far exceeds its everyday use, and that individuals can consciously shape their brains to achieve enhanced capabilities and improve their overall well-being. This concept is gaining traction as researchers explore the brain’s plasticity and potential for lifelong learning.
Tanzi is also the architect of a lifestyle intervention plan for brain health known as SHIELD, which emphasizes the importance of sleep, stress management, social interaction, exercise, good nutrition, and learning. Maintaining brain health throughout life is increasingly recognized as crucial for preventing cognitive decline and improving quality of life.
Now 67, Tanzi credits his research with helping him stay mentally sharp, physically active, and deeply engaged in his work. “I’m working harder, having more fun, and more enthusiastic than ever in my life,” he said.
“Your world can be a completely young or stable world depending on the health of your brain. People don’t realize that.” Here’s what SHIELD entails, how it looks in Tanzi’s daily life, and his advice for aging well.
– Sleep: Aim for 7 to 8 hours of quality sleep each night. Adequate rest is essential for brain function and memory consolidation. “When you sleep, you not only consolidate memories, but you also clear toxins from your brain,” Tanzi explained. “You actually clean out amyloid toxins—that’s the sticky stuff that triggers Alzheimer’s—and it typically starts happening two decades before symptoms. … Every time you go into deep sleep, it’s like a rinse cycle for your brain.”
Tanzi doesn’t have a fixed bedtime, but he counts backward from when he needs to wake up to ensure he gets at least seven hours of sleep. An hour before bedtime, he turns off the television and stops scrolling through social media. “I’m almost religious about getting seven hours or more.”
People often ask him what to do if they’ve only slept five or six hours, and he recommends short naps. “Even a quick one in the office, even if it results in a little drool on your desk, that’s good.”
– Stress Management: Minimize chronic stress, which is linked to accelerated cognitive decline. “It induces cortisol, which is a toxic substance in the brain.” Tanzi is concerned that the constant demands of modern life—such as keeping up with social media or responding to a constant stream of emails—have created unprecedented levels of stress. His preferred strategy for managing stress is meditation.
Public health experts and physicians have identified stress as a leading reason why Americans live shorter lives than their peers in comparable countries. “A lot of people are stressed because of the constant monologue in their heads, the inner chatter. As humans, to communicate with words, we often have words going through our heads, so one trick you can do is sit, close your eyes, and gently let no words or phrases enter your brain. Just think of images… I’ve made it as much of a point in my life as possible to turn off the inner monologue and dialogue as much as possible. … Every hour or two, close your eyes and whatever comes to mind is okay, as long as you’re not listening to words.”
“Obsessing over something that happened in the past or feeling anxious about the future, instead of being in the present,” can also be problematic, he added. Tanzi links some of his thinking to the philosophy of anthropologist and writer Carlos Castaneda, whose books he discovered early in his scientific career.
Modern neuroscience, Tanzi argues, supports the idea that a constant need for validation can overstimulate stress pathways in the brain, eroding mental clarity and long-term brain health. “He said that if you want to have more intuitive flashes and creativity, and feel more mental power, turn off the internal dialogue,” Tanzi said. “I’ve made it as much of a point in my life as possible to turn off the internal monologue and dialogue as much as possible. … Every hour or two, close your eyes and whatever comes to mind is okay, as long as you’re not hearing words.”
– Social Interaction: Maintain an active social life. Loneliness is associated with an increased risk of developing neurodegenerative diseases. “That’s the kind of stimulation the brain likes. Make sure they’re people you like. If they’re people you don’t like, that’s stress. Ask yourself, how often each week do you interact with people who aren’t coworkers or family members you live with?”
Research has shown that social interactions have positive effects on our lives. Due to his busy work schedule and the fact that many of his friends don’t live nearby, Tanzi can’t see his friends in person as often. But texting or talking on the phone is enough, he says. “I have different groups of friends on text, and I take the time to interact with two or three of them a day, but without obsessing over it.” These include college friends, such as his former fraternity brothers, and a basketball group. “This is a way to use social media to benefit your brain.”
– Exercise: Engage in regular physical activity to increase blood flow to the brain and promote the growth of new neural connections. “It does two things for the brain. It induces the birth of new neurons, a process called neurogenesis, and this happens in a part of the brain that’s the first to be affected by Alzheimer’s. It also makes muscles and blood flow faster to release a hormone that breaks down amyloid.”
Tanzi cites a study, published in November in Nature Medicine by Mass General, that found that for every 1,000 steps a person takes, they delay Alzheimer’s by a year. Tanzi has a stationary bike in his office and typically uses it for 30 minutes every other day at 80 to 90 rpm. On other days, he takes a walk in his neighborhood or, if he’s in the office, around the Charlestown Navy Yard near Boston Harbor.
