The Dangers of Loneliness

Why feeling lonely is a warning sign you need to heed
By Gillian Leithman, Concordia University
December 19, 2017 Updated: December 19, 2017

Independence is glorified in North American culture as a symbol of strength. As a society, we value individual achievement and extol self-reliance.

As an expert on aging and retirement, I help employees transition from work to retirement by facilitating seminars and workshops in corporate Canada. In this work, I’ve often wondered if our “go at it alone” attitude has led us down a lonely and isolating path.

Here are some recent and illuminating stats:

According to the research, loneliness shortens our lifespan twice as much as obesity. Yes, you read that right.

Dr. John Cacioppo, the world’s foremost authority on loneliness, maintains that having people in your life does not inoculate you from experiencing loneliness. Rather, it’s the feeling of being lonely that places the brain and body at risk.

Cacioppo equates feeling lonely with feeling hungry. We compromise our survival and well-being when either is ignored.

We are biologically hardwired to respond to our environment. When we experience low blood-sugar levels, we crave food. The feeling of our stomachs being empty is a warning sign to eat, and it’s essential to our very survival. Likewise, when we feel lonely, it’s a sign that we need connection with others.

A Lonely Brain Is Restless

Loneliness triggers “hyper-vigilance.” That is, your brain is on the lookout for social threats, which consequently puts us on the defensive. We become more reactive to negative events and perceive daily hassles as more stressful.

A lonely brain awakens often, experiences fragmented sleep, and cannot recover from the day’s stressful events. It is also subject to an increase in depressive symptoms and has difficulty self-regulating. That is why you may find yourself irritable and impulsive. A lonely brain is also at risk of cognitive and physical decline.

A three-year Dutch study followed more than 2,000 participants aged 65 to 86. While none of the participants had signs of dementia at the outset of the study, results revealed that those who reported feeling lonely had a 64 percent increased risk of developing dementia.

People also experience an increase in loneliness when they retire from work. That’s why you want to make sure that you’re retiring with a plan, and that you have friends outside of your place of employment.

A Lonely Body

Loneliness also affects the body. Psychologist Stephen Suomi’s research indicates that loneliness distorts the expression of certain genes. An experiment separating newborn primates from their mothers during their first four months of life resulted in the altered development of immunity-related genes that help the body fight viruses.

Social psychologist Lisa Jaremka’s research indicates that lonely people have higher levels of activated viruses in their system and are at greater risk of suffering from chronic inflammation, which has been linked to Type 2 diabetes, arthritis, heart disease, and even suicide.

While obesity increases your odds of an early death by 20 percent, loneliness increases your odds by 45 percent, according to research published in the Archives of Internal Medicine.

So, what are we to do with an emotional state that is so powerful that it can alter our brains, compromise our physiology, and shorten our longevity?

The Antidote to Loneliness

  1. Seek out connection. We all need a tribe.
  2. If you are feeling lonely, don’t deny it, and don’t accept it as inevitable.
  3. Acknowledge the consequences of prolonged loneliness. If you ignore hunger, you starve. The same is true of our need for belonging. If you feel lonely, reach out to others.
  4. Recognize that quality relationships are the most effective at feeding this void.

We are physiologically and psychologically primed for connection. The next time you feel lonely and out of sorts, acknowledge it as a signal that you are in need of connection and seek out companionship. Your body and your brain will be thankful that you did, and you may even increase your longevity.

 is an assistant professor of professional business skills and aging, retirement, and knowledge management researcher at Concordia University in Montreal. This article was originally published on The Conversation.

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