Forget the pricey supplements, extreme diets, or millionaire-backed longevity clinics—living longer might be as simple as spending more time with people you love.
That’s the message from immunologist Dr. Jenna Macciocchi, who says social interaction is one of the most powerful (and free) tools to boost your immune system and extend your life.
In an age where figures like Bryan Johnson are spending millions in pursuit of immortality, Dr. Macciocchi warns that we’re looking in the wrong direction. “People assume that if something costs money, it must work. They’re taking 20 supplements, running on stress, and ignoring the basics,” she said in an interview with i paper.
According to Dr. Macciocchi—author of the bestselling book Immune to Age—the real secret to longevity lies in strengthening the immune system, and nothing supports it better than meaningful social connection.
Why Socialising Heals the Body
Socialising not only fends off loneliness—it directly impacts the body’s ability to fight disease and regulate inflammation. Chronic stress keeps the immune system on high alert, increasing inflammation and vulnerability to illness. In contrast, feelings of connection, calm, and safety dial that stress response down.
“The immune system is everywhere in the body,” she explained on the Happy Place podcast with Fearne Cotton. “When your brain detects danger, it sends hormonal signals that your immune cells respond to—readying the body for threat and inflammation.”
One hormone plays a starring role: oxytocin, often called the love hormone or cuddle hormone. It’s released during intimate moments—hugging, bonding, even sex—and has been shown to calm the body and reduce inflammation.
“Our immune cells have receptors for oxytocin,” Dr. Macciocchi says. “That sense of ‘I am loved, I am safe’ isn’t just emotional—it’s immunological.”
Physical Contact Beats Digital Likes
While technology can keep us connected, Dr. Macciocchi emphasizes that it’s physical connection—being in the same room, hugging, sharing laughter—that activates the healing power of socialising.
“Your heart is electromagnetic,” she explains. “When you’re close to others, your heartbeats begin to synchronise. That’s something no video call can replicate.”
It’s why she encourages especially older adults—those over 60—to prioritise time with family, friends, and community.
Her Prescription for a Longer Life?
Dr. Macciocchi’s approach to aging well doesn’t require a lab or luxury wellness program. Instead, her age-by-age longevity blueprint includes:
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In your 30s: Start lifting weights and limit ultra-processed foods and takeaways.
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In your 40s and 50s: Reduce stress and build resilience through lifestyle changes.
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In your 60s and beyond: Stay socially and physically active—connection is key.
And one more thing—befriend your immune system early. “It’s not just something to think about when you’re sick,” she says. “Treat it like a lifelong companion.”
So before you reach for another miracle supplement, maybe just call a friend—and give them a hug.