Researchers who claim women are grumpy for the equivalent of ten days a year have been called sexist by the London newspaper 'Metro'. A vitamin company called Healthspan conducted the survey, which involved interviewing 1,000 women and 1,000 men about what affects their mood. The study said in a typical week, the average woman reckons she spends around five hours in a bad mood. 'Metro' issued an article attacking the study for being "incredibly" and "extraordinarily" sexist. It reported that the study was, "carried out by scientists who could have been spending their time doing something useful". It added the study reinforced sexist stereotypes of women being over-emotional.