Researchers who claim women are grumpy for equivalent of ten days year have been called sexist by London newspaper 'Metro'. vitamin company called Healthspan conducted the survey, which involved interviewing 1,000 women and 1,000 men about what affects their mood. study said in typical week, average woman reckons she spends around five hours in bad mood. 'Metro' issued article attacking the study for being "incredibly" and "extraordinarily" sexist. It reported that study was, "carried out by scientists who could have been spending their time doing something useful". It added study reinforced sexist stereotypes of women being over-emotional. Psychotherapist Sally Brown, spokeswoman for Healthspan, said: "Moods are barometer of our overall well being. The research shows both men and women are susceptible to being in bad mood from time to time." She added that: "Women crave 'me time' and men tend to rely on their partners to help lift them out of their moods." Ms Brown commented on causes for women becoming moody, saying: "Everyday challenges from bad traffic to failing technology can tip women into bad mood." Other bad-mood triggers survey highlighted include feeling fat, worrying about money, breaking nail, fearing their partners were 'not listening' and bad weather.