Ask Dr P
Demystifying Bioidentical Hormones

Let me begin by saying this is a huge topic that is impossible to cover in this short newsletter. In addition, each woman needs to consider whether bioidentical hormones are right for her in the context of her own medical history, symptomatology, and life situation. In other words, you really need to continue this discussion with your health care provider to decide whether bioidentical hormones are right for you. I also want to mention that I use the term "alternative provider" in this discussion to differentiate those who practice conventional medicine from those that may use a more alternative approach. Many of us walk in both worlds, it is not meant to be a divisive term.
What are bioidentical hormones?
Your body produces 3 different kinds of estrogen. E2 or estradiol is produced primarily during the reproductive years, E1 or estrone is produced primarily after menopause, and E3 or estriol is produced primarily during pregnancy. Each form of estrogen works differently throughout the body. It is thought that estriol may be protective against breast cancer but it has not been well studied. Alternative providers will prescribe some or all of these different types of estrogen thinking that it more closely mimics the estrogens normally in the body. This way of prescribing hormone therapy (HT) has not been well studied so it is hard to know if it is of benefit or not.
Your body also produces another type of hormone, progesterone. This hormone is the other dominant hormone produced in women's bodies and one of its' roles is to protect the endometrium (lining of the uterus). Women with a uterus who take estrogen should also take progesterone to prevent endometrial cancer.
There are other hormones that play an active role in women's bodies: testosterone, DHEA, and cortisol are the hormones most talked about. Unfortunately there is little research about the role of these hormones during menopause or whether they should be a part of HT. Many alternative providers test for these hormones and prescribe them along with estrogen and progesterone.
Is treating menopausal symptoms with bioidentical hormones better for women? Probably but we need more research to be sure. I try to prescribe them when I am able. There are many FDA-approved bioidentical hormones available by prescription and covered by insurance. Estradiol comes in many different forms including: pills, patches, creams, lotions, and vaginal products. Progesterone is also available by prescription and covered by insurance. There is some
research beginning to show that women who take bioidentical progesterone may be at lower risk for breast cancer than women who take other progestins. It's likely that all hormones pose some risk for heart disease, stroke, blood clots, and breast cancer. The truth is, we do not know if bioidentical hormones are really safer than other hormones, we need to do more high quality studies to see if it is true.
What are compounded hormones? These are prescription hormones that are prepared by a specially trained pharmacist. By compounding the hormones, pharmacists are able to provide a range of dosages and formulations that are not available from pharmaceutical companies (and therefore, are not approved by the FDA). Alternative providers will provide individualized dosing based upon saliva or blood hormone levels and/or symptoms. The compounding pharmacist can put these individualized doses of hormones into many different formulations (creams, drops, lotions, oils, etc.). Most insurance plans do not cover saliva testing or compounded hormones. Here is the
statement released by the North American Menopause Society about compounded hormones in response to the Oprah shows.
Note: Most conventional providers do not treat women based on hormone levels because there is little evidence that getting hormones to a certain level actually provides better health outcomes or relieves symptoms. In the conventional setting, women are treated based upon their symptoms.
What route of administration is best? It is probably better to use hormones that are given transdermally (through the skin) like patches, lotions and creams. This is because when you take a pill the medication goes through your liver more times than if it is absorbed through the skin. It is thought that by avoiding this "first pass" through the liver there are less problems with blood lipids (fat), platelets, and storage of hormones in the liver. It looks like the risk of
gallbladder disease is lower in women who use transdermal HT and that low dose transdermal HT may not interfere with
blood pressure. Again, we need to study this more to be sure this is the case. Transdermal hormones also provide a more consistent dose of the drug over time than oral medications so they may help manage symptoms a little better. Many women like the convenience of transdermal hormones.
Who should take hormones? This is a very difficult question to answer. Certainly if you are perimenopausal and your symptoms are affecting your quality of life than you should consider HT as one of your options. Most conventional providers prefer to prescribe hormones for women who are having moderate to severe hot flashes. That being said, a lot of women suffer from severe sleep disturbances, "brain fog", and other symptoms that greatly impact their quality of life. I think hormone therapy should be considered in those cases as well. Women with a personal or family history of breast cancer, heart disease, blood clots, high blood pressure or stroke should consider non-hormonal treatment options. (See the Newsletter Archive for the January 2009 WHH Newsletter on non-hormonal drug treatments for menopausal symptoms.)
How long should women be on HT? This is the question of the hour. There are many studies in progress that are starting to answer this question. So far it looks like the risks are lower in: younger women, women closer to menopause, and women who take them for less than 5 years. This information is changing though as more research is being done. A recent study shows no increase in breast cancer for
first 2 years of HT. The recommendations by most professional organizations (American College of Obstetricians and Gynecologists, FDA, and North American Menopause Society) are to take hormones closest to menopause, the lowest dose possible and for the shortest amount of time possible.
It is really important to remember that hormones are not the only treatment for menopausal symptoms. Many women do not want or are unable to take hormones. Last month I talked about non-hormonal drugs that are used to treat menopausal symptoms such as hot flashes. There are also many herbs and supplements that can be helpful. As always, exercise, nutrition, and mind/body therapies are critical too. Let me know if I can help!
