Healthy diet. A healthy diet is likely to prevent ovarian systs, though there is little research to support it. Common advice is to avoid sugar and simple carbs, emphasize fruits & vegies, esp. Dark leafy greens, & minimize meats, dairy, &eggs, esp. If not organic (to avoid hormones & antibiotics in meats). Some advise an alkaline diet & foods rich in phytoestrogens. See my comments for more information & links:.