Both Estrogen and Testosterone are necessary for muscle mass gain. Without Estrogen, you become defined but slim. Estrogen and Testosterone are both anabolic hormones. Estrogen, besides being anabolic, promotes cell division - thus the risk of cancer if it is not balanced.
As we age, both men and women start having declines in Testosterone and Progesterone. This causes an imbalance, which can lead to fatigue, weight gain and water retention. Since Progesterone counteracts Estrogens anabolic effects, the reduction in Progesterone may unleash Estrogen's muscle and thus strength building effects. Estrogen contributes to water retention, while Progesterone is a natural diuretic. Estrogen blocks thyroid hormone, while Progesterone (possibly Testosterone, but I am not yet clear on this), allows thyroid hormone to function. Testosterone and Progesterone are both calming and blood pressure reducing. Thus as the hormone imbalance occurs with aging, a person may become stronger, fatter, yet more tired, with water retention and higher blood pressure. Mood changes can also occur. Estrogen causes aggressive behavior, whereas Testosterone produces calmness and Progesterone produces calmness and nurturing behavior. High testosterone levels leads to the creation of more Estrogen through aromatization, leading to aggressive behavior.
An anti-estrogen is useful for lowering Estrogen levels. But the problem lies not in Estrogen, but in not making enough Testosterone and Progesterone as we age. For women past 30 years of age, anovulatory periods occur. No progesterone is then made since you need ovulation and the resulting corpus luteum to make progesterone.
__________________ Any statement I make on this site is for educational purposes only and will change as medical knowledge progresses. It does not constitute medical advice, does not substitute for proper medical evaluation from physician, does not create a doctor/patient relationship or liability. If you would like medical advice, please ask your doctor. Thank you.
Last edited by marianco; 12-18-2005 at 12:39 PM.
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