Protein is a large, complex molecule that must undergo a series of processes during digestion. During digestion and absorption, protein passes through many organs. Once protein is digested, the body can utilize its nutrients to build and repair many of the cells in the body.
Menstrual cramps may be caused by:[5] 1  Endometriosis: The tissue that lines your uterus becomes implanted outside your uterus, most commonly on your fallopian tubes, ovaries or the tissue lining your pelvis. 2  Uterine fibroids: These noncancerous growths in the wall of the uterus may be the cause of pain.
Women who are in the throes of early menopause may begin to notice cramping in their pelvic floor around ovulation or right before or after their menstrual periods. Women who already have endometriosis or IBS, may experience more pain from inflammation and built-up scar tissue once the hormones begin to decline.