Just 30 minutes in the sun or up to an hour below the clouds can make a big difference to your feeling, says sleep and light researcher Arne Lowden at Stockholm University.
– It is a dose that we should normally be able to have as a benchmark, he says.
Shock the body
It can be about the daily rhythm, essential physical functions and serotonin production. The sunlight seems to have an effect on most things.
But for intense sunlight in a short time, on the other hand, can shock the body and negatively affect more sensitive individuals. In addition, a trip to sunny latitudes does not mean a happier summer.
Hear Arne Lowden about what is true and false when it comes to sunlight and happiness in the video above.