Characterised by depression, extra but unsatisfying sleep and weight gain. With shorter daylight hours, the pineal gland makes more of the sleep/wake cycle hormone melatonin, which may have an effect on brain serotonin.
To compensate for irritability, discomfort, moodiness and depression, sufferers eat more carbohydrate to lift serotonon levels. But because as little as 1.5oz (50 grms) of carbohydrate can start the reaction that produces serotonin, eating more than that will make you fatter but no calmer. The effect is also delayed and it may be an hour before after dinner biscuits are digested and begin to soothe the mind and ease appetite.
Source not recorded, date not known
