Vol. 3, #43
November 18, 2006
Q: What is bioidentical hormone therapy and is it safe? - Layperson
A: There's a whole vocabulary that carefully distinguishes the two types of hormones. Promoters of bioidenticals refer to their products "natural," demonizing commercial products as "synthetic" or even "counterfeit." Supporters talk about replacing the hormones your own body makes. Bioidenticals, they say, augment your natural hormone production and create balance, while synthetics merely mimic female hormones and create a state of hormonal imbalance. Sounds convincing, until you consider that the conjugated estrogens in Premarin and Prempro could arguably be called "natural" too, because they are derived from the naturally produced urine of pregnant mares.
For women entering menopause who decide to take hormone replacement therapy, (HRT), doctors usually prescribe synthetics. The most popular is called Pre-mar-in, althought other conjugated estrogens with similar names are used. These estrogens are often called "natural", however, they are not natural to a woman's body. Medical evidence has demonstrated the increased risks of breast, uterine, ovarian and cervical cancer linked with these widely used "synthetic estrogens". Premarin and it's equivalent is big business. Most women are uninformed and their doctors do not educate them because most women would not think to ask if their HRT comes from a pregnant mare.
Bioidentical hormone therapy, often called "bioidenticals" has been effective at relieving the symptoms of menopause and are a true replacement. They are designed to be molecularly "identical" to our body's production of these life sustaining hormones. Bioidenticals are derived from plant extracts and are obtained from a compounding pharmacy. Not all doctors are familiar with this type of hormone replacement therapy. If you choose to use bioidenticals, it is best to find a physician who specializes in this type of protocol.
Many bioidenticals are compounded by pharmacists who blend various ingredients in specific amounts to create just-for-you medications. A compounding pharmacist may also create alternative delivery systems (a cream or lozenge, for instance) to commercial ones. However, some so-called bioidentical hormones are already available in commercial products, including those delivered through a skin patch or gel. Mainstream doctors prescribe these all the time (some common brands include Estrace, Climara, and Prometrium) but won't claim that they have any special powers and may not emphasize that they are bioidentical.
Unlike commercially available products, compounded formulas are not regulated by the FDA. "With an FDA-approved hormone, you know that it has been produced in an FDA-approved facility. And if a drug company gets FDA approval for a drug in capsule form, it has to go through the approval process again before selling the same ingredient in a cream or another form," says Larry Sasich, assistant professor of pharmacy at the Lake Erie College of Medicine, in Pennsylvania. "In many compounded products, we don't know the source of the hormones or how well they work in the form provided. What consumers may be dealing with is a shadow drug industry, one that produces untested products."
Sometimes there's a good reason for compounding: You need a lower dose of testosterone than the one contained in the formula approved for men; you're allergic to the peanut-oil base in a particular product; your doctor wants you to use a lozenge. However, with a compounded formula, there's very little quality assurance -- you can't be sure you're getting the right dose, and you can't know how much of the hormone will enter your bloodstream from the compounded cream, lozenge, gel, or capsule.
But is there really such a thing as a harmless hormone? "Even hormones made by your body can hurt you," says Adriane Fugh-Berman, MD, who teaches in the complementary and alternative medicine program at Georgetown University. "There's lots of data that indicates women with higher natural levels of estrogen are at a higher risk for breast cancer."
Bioidentical hormones have not been studied in clinical trials in the U.S., which frees promoters to claim that, among other things, estriol is not only safe but may prevent cancer because it is weaker than the other estrogens. But any estrogen needs to be taken with caution. For years, oral estriol was prescribed in Europe without the standard progesterone accompaniment to protect against endometrial cancer. Then a study in Sweden revealed that taking one to two milligrams a day of estriol alone doubled the risk of endometrial cancer. In another study in Sweden of 5,000 women, published in February 2006, stronger estrogens increased the risk of ductal and lobular breast cancer. That's really no surprise, but here's what was -- even low-dose oral estriol (about one milligram a day) doubled the risk of lobular breast cancer in women who took it for fewer than five years. "We need more studies, but at this point, we cannot rule out an increased risk for breast cancer even with the less potent estriol," says lead researcher Lena Rosenberg, MD, of the Karolinska Institute, in Stockholm, Sweden.
The role of hormone therapy in the peri- and post menopause is to re-establish the balance that has been lost by the body's bumpy transition from the gently rolling cyclicity of the reproductive years to the lack of estrogen (and frequently testosterone) when the ovaries cease functioning. Many different estrogens, progestogens, combina-tions and delivery systems are available.
In this (usually temporary) replacement, it makes sense to utilize compounds and delivery systems that are best accepted by a woman's body.
A bioidentical is a compound that is biologically identical to that (previously) produced by the body. Also erroneously called "natural hormones", bioidenticals are synthesized in the lab, usually from plant sources (soy beans, wild Mexican yam) to be biologically identical to the hormones secreted from a woman's own ovaries.
Bioidentical hormones include: (1) Estradiol ("E2")--the primary hormone from the ovary. (2) Estrone ("E1")--also secreted from the ovary and to a small degree from adrenal glands; very biologically active. (3) Estriol ("E3")--a byproduct of E1 and E2 metabolism; a weak estrogen. Estriol is not normally secreted from the ovary. (4) Testosterone. (5) Progesterone.
Bioidentical Adrenal Hormones: (1) Pregnenolone. (2) DHEA.
The whole idea of bioidentical hormonal balancing is to re-establish your individual homeostatic hormonal milieu, regain your strength and confidence and then, at your own pace, manage your hormonal taper down all of the way to "taper off", if possible.
A picture is beginning to emerge from all of the confusing results of recent studies. (1) Hormonal therapy is much safer if started at peri-menopause (or early post menopause) rather than many years after menopause. (2) The safest way to administer hormone therapy is to utilize the lowest effective dose of estrogen, giving progestagen (bioidentical progesterone or a mild synthetic) intermittently (if at all), utilizing testosterone in low doses. The testosterone potentiates the action of estrogen and may have (in low doses) an inhibitory effect on cancer-cell proliferation in the breast. Dormant breast tumors that are hormonally sensitive usually have both estrogen and progesterone receptors, so giving both (whether the synthetic or bioidentical) is potentially more dangerous in the long run. (3) After stability is obtained, very slowly, and at the individual's own pace, taper hormone therapy with the goal, after three-seven years, of tapering off all together if tolerated. (4) Some women may wish to continue on low-term hormone therapy. If so, the safest is microdose estrogen, without progesterone, with or without a low dose of testosterone. There probably is an increased risk of breast cancer, but the numbers are extremely small (and estrogen offers bone and colon cancer protection); many women will elect to take this risk because of quality of life factors. IV. Sexual Health: Testosterone, Estrogen, Vaginal Health and Couple's Issues.
It's not just estrogen that's a troublemaker: In June 2006, researchers at the Harvard School of Public Health reported that, after accounting for other common risk factors, postmenopausal women not taking hormones who ranked in the top 20 percent in testosterone levels were at least three times more likely to become diabetic than those naturally low in testosterone. "The research does raise some concerns that testosterone therapy [which is prescribed to boost libido] may possibly increase the risk of diabetes in women," says JoAnn E. Manson, MD, chief of the division of preventive medicine at the Brigham and Women's Hospital, in Boston.
It's a fallacy that if hormones don't come from a pharmaceutical company, then there's no cancer, stroke, or other disease risk associated with them.
The WHI study, whose results scared so many women away from hormone therapy, looked at just one drug, Prempro, a specific combination of oral estrogen and synthetic progestin. Over the past 15 years, information has accumulated establishing the lowest effective doses for treating menopausal symptoms, and many low-dose products and topical formulas (patches, gels, creams) are now on the market.
"We've gone through the same process with menopausal hormones as we did with oral contraceptives," says Wulf Utian, MD, of the North American Menopause Society. "The first birth control pills could have killed an elephant. But the hormones in second-, third- and fourth-generation pills became progressively lower, so now you get only a small fraction of what was in the pills in the early 1960s."
The scientific community is only just beginning to put
bioidenticals to the test, but some early results don’t bode well for the
so-called “natural” alternative. The findings of the Million Woman Study in 2003
indicated that bioidenticals increased the risk of breast cancer. Another
study’s findings released in 2003 reported that bioidenticals did not slow the
progression of artherosclerosis.
A surge of interest in bioidentical hormonal therapy came about because of a book published by actress/self-proclaimed fitness guru, Suzanne Sommers 's , Ageless: Bioidentical Hormones and Beyond. Needless to say, cosmetic/plastic surgery and liposuction have played a large role in her youthful appearance.
In short, hormones, no matter what their source is, exert very powerful effects on/in the body. The body has a complicated compensatory biofeedback system in which hormones play a major role. Taking external hormonal supplementation will cause the body to make changes to restore previous balances and the end result will still be the same. Symptom improvements most likely, will be temporary. Contact the appropriate healthcare professional familiar with natural/synthetic hormonal replacement.
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DISCLAIMER: The information in this column, is NOT intended to diagnose and/or treat any health related issues and is provided solely for informational purposes only. Consult the appropriate healthcare professional before making any changes to your healthcare regime. Even what may seem like simple changes in the diet for example, can interact with, and alter, the efficiency of medications and/or the body's response to the medications. Many herbs and supplements exert powerful medicinal effects. Neither the author, nor the website designers, assume any responsibility for the reader's use or misuse of this information.