Laughter is a natural expression often associated with happiness. However, many people believe that laughter not only makes us happy but can also boost the immune system.
Is this just a myth, or is there scientific evidence supporting this claim?

How Does Laughter Affect the Body?

When we laugh, the body undergoes various physiological reactions that can benefit our health, including the immune system. Here are some of its effects:

1. Releases Happiness Hormones 🧠

   Laughter triggers the release of endorphins, serotonin, and dopamine, known as the "happiness hormones." These hormones help reduce stress, improve mood, and induce relaxation.

2. Reduces Stress Hormones 😌

   Cortisol and adrenaline are stress hormones that, in excess, can weaken the immune system. Studies show that laughter can lower cortisol levels, making the body more prepared to fight illness.

3. Boosts Immune Cell Production 🦠

   Some studies suggest that laughter can increase the number and activity of NK cells (natural killer cells) that fight viruses and abnormal cells in the body.

4. Improves Blood Circulation ❤️

   During laughter, blood flow increases, and blood pressure decreases, which benefits heart health and reduces the risk of cardiovascular diseases.

5. Increases Oxygen Intake 💨

   Laughter makes us take deeper breaths, increasing oxygen supply to the brain and the body, which helps boost energy and stamina.

Scientific Facts: What Does Research Say?

✅ Study by Dr. Lee Berk (Loma Linda University, USA)

• His research shows that laughter increases immune cell activity, specifically NK cells, which fight viruses and tumors.

✅ Research in the Journal of Psychosomatic Research

• People who laugh regularly have lower stress levels and better immune function compared to those who laugh less.

✅ Mayo Clinic

• States that laughter activates the body’s relaxation response, helping reduce physical tension and improving the immune system.

With all this research, it can be concluded that laughter does indeed have tangible benefits for the immune system.