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DIM in Broccoli To Prevent Breast Cancer

The above chart illustrates the remarkable increase in male estrogen levels that occur with aging. High estrogen levels in both men and women usually lead to cancer or other illnesses often associated with aging, including prostate disease, breast and uterine cancers, and weight gain.

Supplementing the diet with DIM and eating cruciferous vegetables increases the specific aerobic metabolism for estrogen, multiplying the chance for estrogen to be broken down into its beneficial, or "good" estrogen metabolites. These "good"estrogen metabolites are known as the 2-hydroxy estrogens. Many of the benefits that are attributed to estrogen, which include its ability to protect the heart and brain with its antioxidant activity, are now known to come from these "good" metabolites.

When DIM increases the "good" estrogen metabolites, there is a simultaneous reduction in the levels of undesirable or "bad" estrogen metabolites. These include the 16-hydroxy estrogens, which are not antioxidants and can actually cause cancer.

Greater production of these "bad" estrogen metabolites is promoted by obesity and exposure to a number of manmade environmental chemicals. These "bad" estrogen metabolites are responsible for many of estrogen's undesirable actions in women and men, including further unwanted weight gain, breast cancer, uterine cancer, and prostate cancer.

DIM is highly recommended for women on HRT or at risk for breast cancer as it will reduce the toxic effects to estrogen dominance. "Regarding the ratio of 2-OH-estrone to 16-alpha-estrone, which is newer to me, I can inform you that a poor 2/16 ratio (lower 2OH : higher 16-alpha) has been shown to be carcinogenic. Extracts of cruciferous vegetables such as I3C (indole-3-carbinole) and its more absorbable metabolite DIM (di-indolyl-methane) apparently improve this ratio thru up-regulation of the CYP1A2 liver enzymes involved in the metabolism of estrogens (Cancer Lett 1997;114(1-2):169-170).

In fact, DIM has been shown to induce a favorable 2/16 ratio and induce apoptosis in breast cancer cells (Biochem Pharmacol 1999; 58(5):825-34, Carcinogenesis 1998; 19(9):1631-9). In addition, I3C also improved 2/16 ratios and induced a complete regression in 50% of patients with cervical dysplasia of CIN II-III (Gynecol Oncol 2000;78(2):123-9).

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