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Our sources

Everything we claim is backed by real research. Here's where our numbers come from. No fluff, no exaggeration.

World Health Organization — Commission on Social Connection, Global Report

Published June 2025. Reveals 1 in 6 people worldwide affected by loneliness, linked to an estimated 871,000 deaths annually.

who.int →

Used for: "1 in 6" statistic, "871,000 lives lost" statistic

Holt-Lunstad, Smith & Layton — Social Relationships and Mortality Risk: A Meta-Analytic Review

Meta-analysis of 148 studies covering 300,000+ participants. Found that people with strong social connections have a 50% increased likelihood of survival. Published in PLoS Medicine.

scientificamerican.com →

Used for: "50% more likely to live longer" statistic, ROI chart context

Harvard Study of Adult Development

One of the longest-running studies on human happiness and health, spanning over 80 years. Core finding: strong relationships are one of the strongest predictors of a long, healthy life.

health.harvard.edu →

Used for: Health and longevity claims related to social connection

American Psychiatric Association — Healthy Minds Monthly Poll

Fielded January 2024 among 2,200 adults. Found 30% of U.S. adults experience loneliness at least once a week, with 10% feeling lonely every day. The U.S. Surgeon General declared loneliness a public health epidemic in May 2023.

psychiatry.org →

Used for: Surgeon General epidemic declaration context

Harvard Making Caring Common — Loneliness in America, 2024

Nationally representative survey finding 21% of U.S. adults experience serious loneliness, with 81% of lonely adults also reporting anxiety or depression.

harvard.edu →

Used for: Loneliness and mental health correlation context