What the science actually says.
Curated, peer-reviewed studies on the mental-health benefits of the human–canine bond — summarized in plain language first, methodology and DOI second.
Featured studies
All studiesInteracting with a familiar dog lowers salivary cortisol in adults.
Ten minutes with a familiar dog meaningfully dropped the body's main stress hormone versus a control who sat quietly. The effect was larger in higher-stress participants.
Mutual gaze between humans and dogs triggers oxytocin in both.
Eye contact with an owned dog raised urinary oxytocin in humans — and in their dogs. The loop mirrored parent–infant bonding.
Companion animals can function as attachment figures in adults.
Across four studies, adults reported using pets as a secure base during stress — mirroring the role of a primary caregiver.
Dog ownership and loneliness during pandemic isolation.
Dog owners reported lower loneliness scores than non-owners during 2020 lockdowns, with effect strongest among those living alone.
Animal-assisted intervention as adjunct to depression treatment.
Adding a structured canine-assisted component to outpatient depression care improved self-reported mood and adherence at six weeks.
Dog ownership and daily step count in older adults.
Older adults who owned dogs took roughly 2,760 more steps per day than non-owners — meaningful both statistically and clinically.