Smoking may have negative effects on the endocrine system, limiting the body's ability to produce estrogen effectively. Smoking in pre-menopausal women has been linked with menstrual dysfunction, infertility, and earlier menopause. Exercise has been linked to a drop in estrogen levels. Avoid excessive exercising, but get regular exercise in. Not only is moderate exercise healthy, it may also decrease the risk of breast cancer in women and increase overall longevity. Athletes may experience a drop in estrogen levels. This is because women with low levels of body fat have more trouble producing estrogen. If you are an athlete or have low body fat levels, see your doctor for a good way to replenish your estrogen. Your endocrine system needs a healthy body in order to work properly and produce normal levels of estrogen. Women cannot obtain estrogen from their diet, but eating a wide variety of fresh foods gives your system the best chance to naturally produce estrogen. Soybean products, especially tofu, contain genistein, which is a plant product that mimics the effects of estrogen.  In large quantities, these may be able to lessen menopausal symptoms, but soy may not make a significant difference in hormone levels. If you want to try incorporating soy products into your diet, you may try the following:  Edamame Miso, in small amounts Soy nuts Tempeh Textured Soy Product (TSP), or foods made from textured soy flour. Sugar can lead to a hormone imbalance in the body. Switch from simple carbs to a lower-carb, whole-grain diet. For example, instead of white flour, opt for whole grain flour. Use whole grain pasta or brown rice. Women who drink more than two cups of coffee (200 mg of caffeine) per day may have higher estrogen levels than women who don't. While caffeine may increase estrogen levels, it does not seem to increase fertility. If you're trying to increase estrogen in order to ovulate, coffee and caffeine may not help much.  Use organic coffee. Most coffee is a heavily sprayed crop, so drinking organic...

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Write a summary of the previous text in Vietnamese:
Cai thuốc. Tập thể dục nhẹ nhàng. Duy trì chế độ ăn uống lành mạnh. Ăn đậu tương và uống sữa đậu nành. Giảm sử dụng đường. Uống cà phê.