A leading Spanish cardiologist has warned that loneliness may be just as damaging to heart health as smoking 15 cigarettes a day.

Dr Aurelio Rojas made the striking claim during a talk at Agora UTAMED University, where he highlighted the growing body of evidence linking emotional wellbeing to cardiovascular health.

While smoking, alcohol and poor diet are widely recognised as major risk factors for heart disease, Rojas said many people underestimate the impact of loneliness and social isolation.

‘People who feel lonely have the same risk of suffering a heart attack as if they smoked 15 cigarettes a day or drank six alcoholic drinks,’ he said.

‘To think that our emotional state, what we feel and how we live day to day does not directly influence the health of our heart is a mistake.’

The cardiologist stressed that happiness, gratitude, meaningful relationships and having a sense of purpose are among the most important factors for protecting heart health.

‘Feeling happy, feeling fulfilled, giving thanks, loving, living in a pleasant environment and having a purpose are some of the most important factors in protecting the heart,’ he added.

His comments are backed by growing scientific evidence.

According to the Spanish Heart Foundation, unwanted loneliness and social isolation are now considered serious cardiovascular risk factors.

Experts say prolonged loneliness can increase levels of cortisol – commonly known as the stress hormone – while also raising blood pressure and creating chronic inflammation throughout the body.

Over time, these changes can contribute to a higher risk of heart disease, stroke and other serious health conditions.

Loneliness can also trigger lifestyle changes that further damage health, including reduced physical activity, poorer sleep quality and less healthy eating habits.

Research cited by the Spanish Heart Foundation suggests that social isolation and unwanted loneliness increase the risk of suffering a heart attack or stroke by around 30%.

Health professionals have increasingly warned of what some describe as a growing ‘loneliness epidemic’, particularly among older adults, people living alone and those who struggle to maintain social connections.

While doctors continue to encourage healthy diets, exercise and avoiding smoking, experts say maintaining meaningful social relationships may be just as important for long-term health.