Why employers should be aware of SAD

SAD is a type of depression that can come on in the autumn and continue until spring. Figures supported by the Royal College of Psychiatrists show that one in every three people are affected in some way by the disorder, with as many as one in 15 being severely affected.

At its worst SAD can have a significant impact on working life. So what exactly is SAD and how can employers help?

What is SAD and why does it happen?

Shorter days and longer darker nights are associated with season-specific depression; fewer than 12 hours of available daylight can be a risk factor for SAD. While the exact cause of SAD is unknown, theories by the National Sleep Foundation suggest it involves circadian rhythms and melatonin in the body. When it is dark outside your eyes signal to the hypothalamus in your brain that it is time to feel tired. Your body’s pineal gland then releases melatonin, which makes your body respond with tired sensations. Other ideas look to serotonin regulation – which affects mood – playing a key factor, which can be affected by a number of things, including lack of vitamin D.