Hormones and cardiovascular risk
17, 03 07, 09:42 Filed in: Medical
Sometimes I'm disappointed by the journals. Circulation recently had an article on reducing women's risk of cardiovascular risk, in which hormone replacement was listed as class III (not useful/effective, may cause harm). A summary of the article in Medscape breaks down the variation in risk:
So, there is risk in the standard hormone treatment of oral estrogen and progestins (synthetic progesterone-like molecules): each raises the risk of a clot 4-fold. However, it also shows that transdermal estrogen doesn't increase the risk and may lower it and that progesterone similarly doesn't raise the risk. Using bioidentical hormones in a smart manner, then doesn't raise the risk and likely lowers it going from this article.
Sadly, they also list folic acid and antioxidants in the same class that says "may cause harm". Clearly, no one has died from antioxidants or folic acid. There has been a limited number of studies showing some increase in risk with fractionated antioxidants (beta-carotene or alpha-tocopherol alone) in certain circumstances, so it is important to get use full-spectrum antioxidants when using higher doses (mixed carotenoids with selenium or mixed tocopherols).
Sadly, newspapers often pick up these articles without any background and trumpet it as fact. It pays to read in more depth, and be cautious about people who paint all hormone replacement with the same brush: there are clear differences in risk between approaches, and this is why I do not use oral estrogen at all.
Researchers found that "route, type, and dose" of hormone therapy matters, in the Estrogen and Thromboembolism and Risk Study (ESTHER), a multicenter study conducted in 8 hospitals in France that included 271 cases and 610 controls. Compared with nonusers, oral estrogen users had an odds ratio of 4.2 (95% confidence interval [CI], 1.5 - 11.6) and 0.09 [this is probably a typo and the risk should be 0.9] (95% CI, 0.4 - 2.3) for transdermal estrogen. Norpregnane derivatives were linked to a 4-fold increase in venous thromboembolism; but there was no risk for venous thromboembolism with micronized progesterone and pregnane derivatives in the study.
So, there is risk in the standard hormone treatment of oral estrogen and progestins (synthetic progesterone-like molecules): each raises the risk of a clot 4-fold. However, it also shows that transdermal estrogen doesn't increase the risk and may lower it and that progesterone similarly doesn't raise the risk. Using bioidentical hormones in a smart manner, then doesn't raise the risk and likely lowers it going from this article.
Sadly, they also list folic acid and antioxidants in the same class that says "may cause harm". Clearly, no one has died from antioxidants or folic acid. There has been a limited number of studies showing some increase in risk with fractionated antioxidants (beta-carotene or alpha-tocopherol alone) in certain circumstances, so it is important to get use full-spectrum antioxidants when using higher doses (mixed carotenoids with selenium or mixed tocopherols).
Sadly, newspapers often pick up these articles without any background and trumpet it as fact. It pays to read in more depth, and be cautious about people who paint all hormone replacement with the same brush: there are clear differences in risk between approaches, and this is why I do not use oral estrogen at all.
