Smiling helps you live 7 more years

The wider the smile and the deeper the wrinkles of the eyes become, the longer you live, experts say.

Scientists from Wayne University, Michigan State (USA) investigated 230 photos of baseball players printed on the Baseball Directory in 1952.

This directory lists data about each individual, such as birth date, weight, marital status, job details.

The team assessed each person according to the extent to which they laughed: not smiling at all, smiling half-smile, or smiling all the way (open teeth, cheeks lifted and wrinkled around the eyes).

Then they compare these photos to the life of each player.

According to The Hindu, as a result, out of 184 people who have died since then, those in the "not smiling" group have an average life of 72.9 years.

In the "half-smile" group, the average life expectancy is 75. The group with the largest smile lives an average of 79.9 years - 7 years more than the cold-faced group.

The study also found that pretending to laugh did not bring similar benefits, because the increased life expectancy was only recorded in players with real smiles - when both the eye and mouth muscles moved together.