Women do not benefit from eating healthier types of certain foods if they have high levels of stress the day before, a new study published in the journal Molecular Psychiatry suggests. “Eating a breakfast with ‘bad fat’ was just the same as eating one with ‘good fat,’” Dr. Martha Belury, a professor of human nutrition and a co-author of the report, says. This is the first research to show that stress can nullify the benefits of eating meals prepared with healthier, monounsaturated fats – like those found in sunflower, olive or peanut oils. Another comparable study, the results of which were similar, observed 48 couples, both men and women, Belury says. “We don’t think the result would be different for men but, of course, we have to study this possibility,” Dr. Belury says.