Can Pets Help Keep Your Brain Young? What the Research Shows

More than just companions, our furry friends bring a multitude of health benefits.

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A dog waiting by the door may be doing more than asking for a walk. That daily ritual could be one of several ways pets quietly influence how people age.

Research has linked pet ownership—particularly dog ownership—with less loneliness, greater physical activity, and slower cognitive decline in some older adults.

The emerging picture suggests that the benefit may come not simply from having an animal nearby, but from the behaviors and relationships that caring for one creates.

Can Pets Help Keep the Brain Young?

One of the most intriguing areas of research involves cognitive aging.

A Scientific Reports study followed 637 generally healthy adults aged 50 to 100 for up to 13 years. Pet owners experienced slower decline on several measures of cognitive function than nonowners. Among dog owners, dog walking was also associated with slower deterioration on certain cognitive tests.

Another study involving nearly 8,000 adults aged 50 and older found that pet ownership was associated with slower decline in verbal memory and verbal fluency—but specifically among people who lived alone. The same association was not seen among those living with other people.

These studies are observational, meaning they cannot prove that pets themselves protect the brain. People healthy enough to care for animals may differ from nonowners in important ways.

Still, feline specialist Kuo Lan-Hsin believes the repeated stimulation involved in caring for an animal may be important. The nervous system remains plastic throughout life, she told The Epoch Times, and activities that require people to move, plan, respond, and interact continually engage the brain.

Dog Ownership and Dementia

A large Japanese study provides another clue.

Researchers followed more than 11,000 community-dwelling older adults and found that current dog owners had about 40 percent lower odds of developing disabling dementia during roughly four years of follow-up than people who had never owned or previously owned a dog. Cat ownership was not associated with the same benefit.

The association appeared particularly strong among dog owners who exercised regularly and were not socially isolated.

That distinction may help explain the findings. Walking a dog combines physical activity with time outdoors and opportunities to interact with neighbors and other dog owners. Feeding and caring for an animal also creates daily responsibilities.

Rather than suggesting that dogs prevent dementia, the research raises a more practical possibility: Dog ownership may encourage several behaviors already associated with healthy aging.

 Companionship, Stress, and Daily Routine

Pets may be particularly valuable when human companionship is limited.

In one study of adults aged 60 and older, pet owners were 36 percent less likely to report loneliness than nonowners after researchers accounted for several other factors. Those who lived alone without a pet were particularly likely to report loneliness.

During the COVID-19 pandemic, a PLOS One study similarly found that dog owners reported lower depression scores and greater perceived social support than people who wanted a dog but did not own one.

However, research on pets and mental health has produced mixed results. Pets cannot replace human relationships, nor should pet ownership be considered a treatment for depression or loneliness.

Their potential benefit may instead come from the combination of companionship and daily structure.

Pets need to be fed, groomed, played with, and, in the case of dogs, walked. These responsibilities can create anchors throughout the day and provide a sense of purpose, particularly for people who are retired or live alone.

Human-animal interaction may also affect the body’s stress response. Studies have linked interaction with companion animals to changes in blood pressure, heart rate, and stress-related hormones. Eye contact between dogs and their owners has also been associated with oxytocin, a hormone involved in social bonding.

At the same time, pets can create stress. Veterinary bills, behavioral problems, sleep disruption, and caregiving responsibilities mean that the experience depends greatly on the person, animal, and circumstances.

When Animals Become Part of Therapy

The human-animal relationship has also moved into formal health care.

Psychologist Boris Levinson helped pioneer the modern field after observing that his dog, Jingles, helped some children engage during psychotherapy. In 1964, he introduced the term “pet therapy.”

Today, trained animals are used in hospitals, nursing homes, rehabilitation programs, and other settings. Animal-assisted therapy has been studied for potential benefits including reducing anxiety and stress and improving patient engagement.

Dogs can also be trained to assist people with epilepsy by responding during or after seizures, while their exceptional sense of smell has inspired research into detecting biological signals associated with diseases such as cancer.

These applications differ from ordinary pet ownership because the animals are selected and trained for specific therapeutic or assistance roles.

 Is a Pet Right for Everyone?

While pet ownership may offer health benefits, getting a pet primarily for health reasons requires careful consideration.

Kuo recommends considering the animal’s size, temperament, health, and activity level alongside the owner’s physical abilities and living environment.

For older adults, size can be particularly important. A large or energetic dog may pull unexpectedly on a leash or collide with its owner, increasing the risk of a fall.

Practical demands also matter. Veterinary care, food, grooming, allergies, housing restrictions, travel, and the owner’s ability to care for the animal over its lifetime should all factor into the decision. The animal’s welfare is equally important.

For people who enjoy animals but cannot manage full-time ownership, spending time with a family member’s pet, volunteering with animals, or participating in an organized animal-assisted program may offer alternatives.

Ultimately, the research does not suggest that pets are medicine. Their potential health value may be much more ordinary—and perhaps more interesting.

A pet gives its owner someone to care for, a reason to maintain a routine, and, in the case of a dog, a reason to get up and go outside.

Over time, those small demands may add up to something meaningful.