Researchers from the University of Massachusetts Amherst conducted a study in which the mineral intake of 3,000 women was tracked. Investigators reviewed data gleaned from the food frequency questionnaires the women filled out over the course of ten years. They found that the diets that contained the most non-heme iron (the type found in plant foods) had a 30 to 40 percent lower risk of PMS than diets that contained the least non-heme iron. The researchers also reported that a higher intake of zinc was associated with a lower risk of PMS, while a higher intake of potassium was linked with a higher risk.
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