SAD (Seasonal Affective Disorder) is believed to be caused by a lack of exposure to Sunlight. With long winters and an increasingly indoor lifestyle, the modern Briton is at increased risk of developing this condition. Having regular, controlled exposure to UV light can indirectly reduce the symptoms of SAD by providing an artificial outdoor environment.
UV light boosts Vitamin D and Serotonin production. Serotonin is the hormone associated with mood elevation and it has been found to rise with exposure to bright light and fall with decreased sun exposure.
As with any other medical condition, we advise that you consult with your GP or Health professional in respect of specific medical conditions.