Posts Tagged ‘estrogen’

Many postmenopausal women are looking for alternatives to hormone therapy, especially in light of the recent Women’s Health Initiative research findings concerning the risks of combined estrogen and progestin therapy. Of particular interest are phytoestrogens, which have been gaining popularity due to their “natural” status, alleged health claims, and availability in a wide range of foods and supplements.

What are Phytoestrogens?

Phytoestrogens are naturally occurring plant compounds that have some similarities to estradiol, the most potent naturally occurring estrogen. However, phytoestrogens tend to have weaker effects than most estrogens, are not stored in the body, and can be easily broken down and eliminated.

Observational studies have found a lower prevalence of breast cancer, heart disease and hip fracture rates among people living in places like Southeast Asia, where diets are typically high in phytoestrogens. In North America, knowledge of these reported health effects has stimulated great interest in the health benefits of phytoestrogens. According to the Food and Drug Administration, the sale of soy foods, a major source of phytoestrogens, has increased dramatically in the past decade.

Dietary Sources of Phytoestrogens

Phytoestrogens consist of more than 20 compounds and can be found in more than 300 plants, such as herbs, grains and fruits. The three main classes of dietary phytoestrogens are isoflavones, lignans and coumestans:

1. Isoflavones (genistein, daidzein, glycitein and equol) are primarily found in soy beans and soy products, chickpeas and other legumes.

2. Lignans (enterolactone and enterodiol) are found in seeds (primarily flaxseed), cereal bran, legumes, and alcohol (beer and bourbon).

3. Coumestans (coumestrol) can be found in alfalfa and clover. Most food sources containing these compounds typically include more than one class of phytoestrogens.

The Skeletal Effects of Phytoestrogens

Much of the evidence concerning the potential role of phytoestrogens in bone health is based on animal studies. In fact, soybean protein, soy isoflavones, genistein, daidzein and coumestrol have all been shown to have a protective effect on bone in animals who had their ovaries surgically removed.

In humans, however, the evidence is conflicting. Compared to Caucasian populations, documented hip fracture rates are lower in countries such as Hong Kong, China and Japan where dietary phytoestrogen intakes are high. Yet reports suggest that Japanese women have a greater risk of sustaining a vertebral fracture than Caucasian women.

Several studies have explored the effects of soy isoflavones on bone health, but results have been mixed, ranging from a modest impact to no effect. Most of these studies have serious limitations, including their short duration and small sample size, making it difficult to fully evaluate the impact of these compounds on bone health.
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Tamoxifen, known in the trade as Nolvadex, is usually prescribed by specialists in breast cancer and is taken in pill form. A patient will stay on the drug for about five years.

Often the woman’s cancer will be tested to see if it is sensitive to the amount of oestrogen in the system. If the cancer is oestrogen sensitive, tamoxifen will be given.

Because tamoxifen is such a weak estrogen, its estrogen signals don’t stimulate very much cell growth. And because it has stolen the place away from more powerful estrogen, it blocks estrogen-stimulated cancer cell growth. In this way, tamoxifen acts like an “anti-estrogen.”

Tamoxifen may also take the place of natural estrogen in the receptors of healthy breast cells. In that way it holds down growth activity, and possibly stops abnormal growth and the development of a totally new breast cancer. By blocking natural estrogen from getting to the receptors, tamoxifen is helpful in reducing the risk of breast cancer in women at high risk who have never had breast cancer. It also can help women who have already had breast cancer in one breast by lowering the risk of a new breast cancer forming in the other breast.

One study found that radiation plus tamoxifen was much better than tamoxifen alone at reducing the risk of breast cancer coming back after a lumpectomy in women with hormone-receptor-positive breast cancer. This was true even for women with very small cancers.
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Our hormone health effects our bodies in many ways but one specific way is an increase in weight. Hormonally challenged women gain weight around their middle between the armpits and the top of the thighs. Often their arms are normal, their legs are normal and from the neck up they look great! Hormonally challenged men gain weight around their waists and often are on their way to developing breasts!

Estrogen is produced in our fat cells. Estrogen increases fat cells. As a result more estrogen is produced and so on and so on.

Breaking the Estrogen cycle and then going on an excellent weight management program is exactly what needs to take place.

Step One Evaluate your hormones. Find out the ratio of estrogen to progesterone presently in your body. If out of balance, we call that estrogen dominance, then you will likely have or currently be gaining weight around your middle.

Step Two Begin an estrogen-lowering program. That will include of course increasing your progesterone levels with a bio-identical progesterone cream. But hormone balancing was never all about progesterone. Modulating and balancing estrogens if found to be out of balance to progesterone is equally important to your weight loss program.
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