While not an expert in this, I no longer have a thyroid due to thyroid cancer and am currently taking a large dose of Synthroid daily to keep my TSH levels to almost zero while taking 2000mg PM daily. TSH is produced by the pituitary gland telling the thyroid gland to make more hormones, and could be a primary indicator your thyroid is not functioning correctly.
I asked the same questions about PM affecting thyroid hormones after reading an article on the web about it possibly doing such, but did not get much. My last endo visit had my TSH levels near where he wanted them, but I don't recall my T3 or T4 levels or if he even checked them. But again, I also have no thyroid, so my situation is completely different.
There's a blurb here that says PM may decrease free thyroxine levels
http://www.drugs.com/npp/pueraria.html
and on the Ainterol forum wflynn stated there was no thryoid effect...
http://www.ainterolherbs.com/forums/Thread-How-does-Pueraria-Mirifica-effect-the-Thyroid
and on this site, Dr Northrup states this about woman, estrogen and thyroid function (note the comment about balancing estrogen with progesterone):
Thyroid problems are intimately intertwined with menopause. According to the late John R. Lee, M.D., a noted clinician and author, there appears to be a cause-and-effect relationship between hypothyroidism, in which there are inadequate levels of thyroid hormone, and estrogen dominance. When estrogen is not properly counterbalanced with progesterone, it can block the action of the thyroid hormone, so even when the thyroid is producing normal levels of the hormone, the hormone is rendered ineffective and the symptoms of hypothyroidism appear. In this case, laboratory tests may show normal thyroid hormone levels in a woman’s system, because the thyroid gland itself is not malfunctioning.
It is no surprise, then, that this problem is compounded when a woman is prescribed supplemental estrogen, leading to an even greater imbalance. In that circumstance, a prescription for supplemental thyroid hormone will fail to correct the underlying problem: estrogen dominance.
http://www.drnorthrup.com/blog/2013/07/estrogen-dominance-a-true-balancing-act
This post was last modified: 24-03-2014, 09:51 PM by Scotti.