Protein during periods itself does not directly reflect specific changes or events within the menstrual cycle. However, protein is involved in various physiological processes that occur during the menstrual cycle. These processes include hormone production, tissue repair, blood production, energy balance, and muscle recovery. For example, during the follicular phase, the ovaries produce estrogen, and protein is needed to support its synthesis. In the luteal phase, the ovaries produce progesterone, which is also dependent on adequate protein intake.