Hormones are chemical substances produced by glands, such as the ovaries and testes. Sometimes hormones act as growth factors for some types of cancer cells, including breast cancer and prostate cancer. In other cases, hormones can kill the cancer cells, retard their growth or stop it. Hormone therapy as a treatment for cancer may include the administration of drugs that interfere with the activity of the hormone or stop the production of hormones. Hormone therapy may consist of surgical removal of a gland that produces hormones.

Women who are starting hormone therapy less than ten years of entering menopause may have less cardiovascular risk in relation to those who begin treatment later this kind, stresses an article published in the prestigious Journal of the American Medical Association (JAMA) by U.S. scientists.

“These new analysis suggests that the impact of hormones on cardiovascular risk varies with the number of years that passed since menopause and by the presence of some symptoms such as heat strokes or night sweats, with greater dangers for women with more than twenty years of menopause, or 70 years.

The first trial was over 10,739 menopausal women who had undergone a hysterectomy, some treated with a compound of estrogen and the other with a placebo.

The second included 16,608 menopausal women but who had not undergone the removal of her uterus and treated either with a compound of estrogen and medroxyprogesterone acetate (similar to but more powerful progesterone) or a placebo.

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