It is estimated that 2 million people in Britain suffer from SAD. (Seasonal Affected Disorder)SAD has a lot in common with the hibernation cycle of animals and research has shown that this is triggered by a response to decreasing light levels. As the days grow shorter and the light becomes less intense, it increases our desire to `hibernate`. Lightboxes are an easy way to alleviate these symptoms and have also been shown to help sufferers of M.E.

The following are symptoms are SAD:

• Depression, feelings of gloom and despondency for no apparent reason •Lethargy, lack of energy • Anxiety, inability to cope • Social problems, irritability not wanting to see people • Sleep problems, finding it hard to stay awake during the day, and having disturbed nights• Loss of libido, not interested in sex or physical contact • Craving for carbohydrates and sweet foods, increased appetite leading to weight gain