The New Epidemic: Social Connection and Brain Health

Social connection is not a “nice-to-have” extra in life—it is as vital to our brain health as food, water, and sleep. For BrainSavers participants and families, the U.S. Surgeon General’s 2023 advisory on social connections shows how our relationships profoundly shape how long we live, how well our brains function, and how we feel day to day.

In his groundbreaking 2023 advisory, the Surgeon General at the time, Dr. Vivek Murthy, warned that the United States is facing an epidemic of loneliness and social isolation, affecting roughly half of all adults. Many people report feeling alone even when surrounded by others. Americans today spend far more time by themselves and far less time with friends and community than in previous decades.

This disconnection is not just emotionally painful; it is biologically dangerous -- and if anything, Murthy's 2023 advisory is even more timely now.

Why Social Connection Matters for Your Brain Health

Decades of research summarized in the Surgeon General’s advisory show that strong social connections:

• Reduce the risk of premature death, with effects comparable to quitting smoking or avoiding heavy tobacco use.

• Lower the risk of heart disease by about 29% and stroke by about 32%.

• Cut the risk of developing dementia in later life by roughly 50%.

• Is linked to lower rates of depression, anxiety, and other mental health challenges.

In fact, lacking social connection can increase the risk of early death as much as smoking up to 15 cigarettes a day and more than many other well-known risk factors like obesity and physical inactivity.

For BrainSavers, this aligns closely with what we teach: caring for the brain is not only about nutrition, physical and mental exercise, stress management, and sleep—it is also about nurturing meaningful relationships.

How Disconnection Harms the Brain and Body

The advisory explains that social disconnection harms health through several interconnected pathways:

• Biological: Chronic loneliness raises stress hormones, increases inflammation, weakens the immune system, and strains the cardiovascular system—all of which damage the brain and other organs over time.

• Psychological: Feeling alone increases the risk of depression, anxiety, and hopelessness, which in turn are associated with faster cognitive decline and worse physical health.

• Behavioral: When people feel disconnected, they are less likely to be physically active, eat well, adhere to medications, or seek preventive care, and more likely to engage in unhealthy coping behaviors.

For older adults in particular, isolation and loneliness are tied to faster memory loss and a greater risk of dementia. Social activity is, quite literally, a workout for the brain.

Who Is Most at Risk?

According to the advisory, anyone can experience loneliness—but some groups face a higher risk:

• Older adults, especially after retirement, bereavement, or loss of mobility

• Young adults, who surprisingly report some of the highest levels of loneliness

• People living alone or with limited family support

• Individuals with chronic illness or disability

• People experiencing financial hardship or discrimination

These patterns reflect social and economic realities, not individual weakness or failure. Recognizing this helps shift the focus from blame to solutions.

A National Strategy—and What It Means for You

The Surgeon General laid out a National Strategy to Advance Social Connection built on six pillars, including strengthening public health infrastructure, rebuilding community institutions, and aligning technology with human connection. But the report also emphasizes something very encouraging: small, consistent actions at the individual and community level can have a powerful impact.

BrainSavers participants, families, and partners can play a meaningful role by:

• Prioritizing relationships the same way we prioritize medical appointments and exercise.

• Joining or creating groups—classes, clubs, volunteer projects, or faith-based activities—to add structure and variety to social life.

• Being fully present with others—putting devices aside, listening deeply, and showing genuine interest.

• Checking in on those at risk of isolation: neighbors who live alone, recently bereaved friends, or relatives with limited mobility.

These are the same kinds of steps BrainSavers encourages as part of a brain-healthy lifestyle.

BrainSavers and the Future of Social Health

The advisory makes one thing clear: we need to have building and maintaining social connections become a public health priority, on par with addressing tobacco use, obesity, and addiction. For BrainSavers, this confirms that our focus on group learning, shared exercise, and social engagement is not just “nice programming”—it is core preventive brain health.

BrainSavers can help answer the Surgeon General’s call: to heal our epidemic of loneliness and isolation and protect the brains and bodies of the people we care about.