Live Well Be Well with Sarah Ann Macklin | Health, Lifestyle, Nutrition How much social connection do we actually need? Loneliness, stress, and midlife health | Anders Hansen
Feb 2, 2026
Anders Hansen, psychiatrist and bestselling author who writes on brain health, explores social connection limits and loneliness. He discusses Dunbar's 150-relationship idea. He explains why in-person cues outperform screens, how brief calls can ease loneliness, and why AI companions and hyper-independence may backfire.
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Human Social Capacity Peaks Near 150
- Robin Dunbar's research suggests humans can maintain roughly 150 stable social relationships.
- Anders Hansen explains this limit arises because we track not just people but their relationships with others.
In-Person Cues Beat Screens
- Real-life, in-person cues (smell, touch, body language) register in the brain in ways screens cannot.
- Hansen argues missing these signals makes the brain interpret social life as isolation, triggering threat responses.
Loneliness Acts Like Chronic Stress
- Loneliness functions as a chronic stress state that heightens threat sensitivity in the brain.
- This ongoing vigilance likely explains increased risks for cardiovascular disease and some cancers.