Red meat consumption is associated to a higher risk of endometriosis. A prospective study conducted on over 80,000 pre-menopausal women indicates that eating more than two servings per day of red meat (hamburger, beef/pork/lamb sandwich, pork, beef, and liver) or five servings or more of processed red meat (hot dog, bacon, and sliced processed meat) per week increases the risk of developing endometriosis by 57% or 20%, respectively. The mechanism may involve heme iron and circulating steroid hormones, that promote the inflammatory and proliferative characteristics of endometriosis. The study was published in the American Journal of Obstetrics and Gynecology.