Friendship: Mental Health Benefits You Need to Know

What is friendship? Some friends may be lifelong companions, while others are more temporary. However, the impact of friendship often remains constant. Below, examine the essence of friendship and its effects on mental and physical health.

What is friendship? Defining connection

What is friendship from a psychological perspective? 

How friendship plays a significant role in mental and physical health

Maintaining social connectedness and close relationships can be important for young adults and older adults alike, as research has indicated that friendship can impact both mental and physical health.

Friendship can often be influential in supporting mental health, positively impacting self-esteem, encouraging belonging, and reducing loneliness. In life, we all face difficult moments that may be easier to manage with the support of a trusted friend. For example, if you’re going through a job loss, friends can provide emotional stability when other areas of your life are disrupted. If you or a loved one is facing a serious illness, friendship can offer comfort that you may not be able to get from medical care alone.

Research suggests that friendship has measurable effects on both emotional and physical health, and that close social bonds play a significant role in how we manage stress, process emotions, and maintain long-term well-being.

For example, research published in the American Journal of Lifestyle Medicine shows that social connection is a major health factor, with adults who maintain strong social bonds showing a lower risk of numerous health problems. Studies on blood pressure reactivity — how much blood pressure rises in response to stress — have found that the presence of a trusted friend during a stressful event can measurably reduce cardiovascular response. And, according to the National Institute on Aging, chronic social isolation is linked to many physical and mental health problems, including: 

• High blood pressure
• Heart disease
• Obesity
• A weakened immune system
• Anxiety
• Depression
• Cognitive decline
• Alzheimer’s disease
• Death

This evidence suggests that friendship may be more than a source of comfort and companionship and may play an important role in mental and physical health.

Friendship across different life stages

Friendship can look different at various stages of life, and understanding how social bonds can evolve can help us be more intentional with our friendships across these stages.

Young adulthood and keeping friends

Young adulthood can bring significant life transitions, like going to college, embarking on a new career, and starting a family, all of which can make maintaining friendships challenging. Friendships that once formed organically because you shared a part-time job, sports team, classroom, or neighborhood may now begin to require more effort. Being open to making new connections can also be important during this stage.

Midlife transitions and lost touch with old friends

Midlife often comes with a number of competing demands that can put pressure on time and energy. Careers, parenting, and caring for aging family members can all erode connections with friends, with some relationships quietly fading without either person realizing that it’s happening. At this stage, reconnecting with old friends, even after years apart, can be refreshing.

Friendship in older adults

For older adults, maintaining and building relationships may require intentionally stepping into new environments to meet new people. A community education center, senior center, faith community, or local gym can be a welcoming space to meet people, with shared activities and interests serving as a natural foundation for new relationships.

What makes a supportive friend?

Meaningful friendships often include an element of emotional support, which may be particularly helpful during difficult times. Emotional support can involve being present for someone, listening to them, and offering empathy and validation. In the face of mental health challenges or other significant life events, a supportive friend can offer a sense of understanding, belonging, and hope. Knowing that someone cares and is there to listen without judgment may help individuals navigate tough situations.

This type of support can have a powerful effect on self-worth, as feeling as if you are truly seen and heard by another person can be a reminder that you are not alone. That said, it can be worth noting that this type of emotional support is a two-way street. Friendships can grow and solidify when respect, support, and understanding flow in both directions.

Quality vs quantity: How many friends do you really need?

Some research has provided very specific results about the optimal number of true friends. For example, a study published by Cambridge University in 2022 found that: 

• Four close friendships could help reduce loneliness
• Two could help reduce depression
• Three could help reduce anxiety
• Two could help reduce stress

When it comes to friendships, though, research has also found that quality friendships contribute to overall life satisfaction. Having a single close friend can be enough to buffer against loneliness and poor mental health outcomes, offering support and safety that a large but shallow network of acquaintances cannot replicate.

When friendship is not enough

While friendship can be deeply valuable and has a number of benefits, it does have its limits. While close confidants can offer support, a listening ear, and advice, they are not a substitute for professional help. If you’re experiencing symptoms of a mental health condition or dealing with the weight of a challenge that feels unmanageable, talking to a mental health professional can offer structured support that goes beyond what a close friend can provide.

Professional support options for friend challenges