How Owning a Dog Boosts Physical and Mental Health: The Science Behind Longevity

Last Updated: March 4, 2026

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The dog-tor is in. Good news for dog lovers: recent studies continue to highlight the positive impact dogs can have on human health, both physically and mentally. Research collectively suggests that dogs are not just loyal companions—they play a significant role in improving human health through physical activity, emotional support, and even social connections. Here are just some of the ways your dog can improve your health. 

The Benefits of Having of a Dog

1. Stay Mentally Sharp: Dogs Lower Risk of Dementia

Dog Ownership Can Cut Dementia Risk By 40% In Older People

Dogs are good for the brain! A new study from Japan found that having a dog lowers the risk of dementia in older adults. The study, published in Preventive Medicine Reports, found that dog owners over the age of 65 are 40% less likely to develop dementia.

Dog owners over the age of 65 are 40% less likely to develop dementia.

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Dog ownership was associated with a 24% reduction in dying early from any cause.

2. Dogs Increase Longevity

A 2019 analysis of nearly 4 million people in the United States, Canada, Scandinavia, New Zealand, Australia, and the United Kingdom found dog ownership was associated with a 24% reduction in dying early from any cause. If the person had already suffered a heart attack or stroke, having a dog was even more beneficial; they were 31% less likely to die from cardiovascular disease.

3. Reduced Risk of Diabetes

A 2016 Helsinki Health Study found that dog owners who regularly walk their dogs reduced their risk of developing type 2 diabetes by about one-third compared to those who don’t own a dog.

Physical activity, especially moderate exercise like walking, is known to help manage weight, improve insulin sensitivity, and reduce the risk of type 2 diabetes.

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4. Heart Happy: Dogs Show to Reduce Risk of Cardiovascular Disease

A 2024 study published in Circulation, the journal of the American Heart Association, found that dog ownership is linked to reduced risks of cardiovascular disease. The research suggests that having a dog encourages more physical activity (e.g., daily walks) and helps lower stress levels, both of which contribute to better heart health.

5. Stress Reduction + Mental Health Benefits

Research from the Journal of Psychiatric Research (2024) confirmed that interacting with dogs can help lower cortisol and boost oxytocin. Best of all, the effects are immediate, instantly helping to relieve anxiety, reduce depression symptoms, and improve overall mood.

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6. Increased Physical Activity

A 2024 study from the Journal of Physical Activity & Health showed that dog owners tend to get more exercise than those without pets. Regular walks and play with dogs contribute to improved fitness levels and a lower risk of obesity and chronic diseases like diabetes.

7. Better Immune Function

A study from Pediatrics in 2024 indicated that children who grow up with dogs may have a stronger immune system. Early exposure to pets, especially dogs, was linked to a lower incidence of allergies, asthma, and autoimmune conditions.

Early exposure to pets, especially dogs, was linked to a lower incidence of allergies, asthma, and autoimmune conditions.

8. Improved Social Interaction

A 2024 study published in Social Science & Medicine revealed that dog ownership promotes social engagement. People with dogs are more likely to interact with neighbours, participate in outdoor activities, and report higher levels of social satisfaction and support, all of which are linked to better mental health.

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9. Therapeutic Effects for Seniors

2024 research published in Gerontology found that dogs provide emotional support and reduce feelings of loneliness in older adults and help seniors stay mentally sharp. Dog ownership in older populations was linked to lower rates of depression and better cognitive function, possibly due to the companionship and routine that pets bring.

Dog ownership in older populations was linked to lower rates of depression and better cognitive function.

10. Improved Sleep

A 2024 study in Sleep Health demonstrated that having a dog in the bedroom can improve sleep quality. The presence of a dog was shown to help people feel safer and more relaxed, leading to more restful sleep cycles, although some individuals may need to adjust for dogs who are disruptive at night.

This article originally appeared in the award-winning Modern Dog magazine. 
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