Laughter is a ‘serious business’ and can reduce stress, fight depression and boost the immune system, researchers have announced.

A new review of the health effects of laughter has shown that it is an effective therapy for depression and can trigger changes in muscles and hormone production which can reduce stress levels and improve quality of life. Conditions as diverse as heart disease, diabetes, eszema and asthma are also thought to be improved by laughing, The Independent reports.

Researchers have suggested that laughter has shown to be beneficial in over two dozen conditions and has been monitored by following the physical responses such as movement of facial muscles, repetitive vocal sounds and in some cases, tears.

The direct physiological effects have been the focus of much of the research and have discovered that laughter can increase levels of natural killer cells, boost levels of natural painkiller, improve anti-inflammatory activity and reduce levels of the stress hormone, cortisol. Some studies have also shown a good laugh increases levels of the ‘cuddle hormone’ oxytocin and melatonin, as well as the brain chemicals serotonin and dopamine, both targets of antidepressant and other medication.

Dr Mora-Ripoll, Author of a new review of the health effects of laughter in the medical journal, Alternative Therapies in Health and Medicine, commented: “There is evidence to suggest that laughter has some positive, quantifiable effects on certain aspects of health. It seems appropriate that laughter therapy should take its place as a complementary medicine in the prevention and treatment of illnesses. Add laughter to your working and daily life, remember to laugh regularly, share your laughs, and help others to laugh, too.”

If you are feeling stressed or anxious or feel as though your workload is having an adverse effect on your health, why not call our confidential Support Line for free information and advice on 08000 562 561 (England) or 08000 855 088 (Wales).

Alternatively, you may find these related factsheets useful:

• Stress
• What is depression?
• Treatments for anxiety 
• How to sleep well