For many people, that conversion works fine. Your body has to convert it to T3 before it can do anything useful. Most thyroid prescriptions are T4-only — Synthroid, levothyroxine. We track this alongside blood work to get the full picture. Many of these symptoms overlap with other conditions — adrenal fatigue, hormone imbalance, depression. We look at the full picture — Free T3, Free T4, Reverse T3, thyroid antibodies, and body temperature patterns — because that is where the real answers are. Poor nutrition is at the root of many diseases and can also create an imbalance of male hormones. At the end of the day, estrogen dose equivalents are best thought of as reference points, not absolutes. There have been some questions about progestogen doses, so I will work on a post. The biggest difference is North America uses a different transdermal to oral estradiol conversion than the Australian and British Menopause Societies. Clinical laboratory units online conversion from conventional or traditional units to Si units. During pregnancy, estrogens are mainly formed in the placenta. Once we know exactly where the breakdown is — production, conversion, blocking, or a combination — we build a plan around the real cause. About 20% of T4-to-T3 conversion happens in the gut. Thyroid hormone production depends on iodine, selenium, zinc, and iron. A thyroid function test often includes a T4 test and a total T3 test. T3 is the active form of thyroid hormone circulating inside cells. T3 and T4 work together to maintain stable hormone levels in the body. Low free T4 may suggest low thyroid hormone. High free T4 may suggest producing too much thyroid hormone. Low free T4 or low levels of free T3 may signal reduced activity even when total T4 is normal. Could the answer lie in the difference between free and total thyroid hormone measurements? High doses of estradiol are not necessarily required if estradiol is used in combination with an adequately effective antiandrogen, for instance cyproterone acetate, bicalutamide, or a gonadotropin-releasing hormone agonist or antagonist. After gonadectomy, testosterone suppression is no longer needed and lower doses of estradiol, such as the moderate doses, can be used instead. For transfeminine people who have not yet undergone or do not plan to undergo gonadectomy, a high to very high dose of estradiol can be used to achieve strong suppression of testosterone levels. Due to the variability in estradiol levels between individuals, the appropriate doses will often not be the same for different people. Why do some people have normal thyroid labs yet still feel exhausted, foggy, or gain weight? One of the most common questions where hormones are concerned is what dose of one form is equivalent to another. Hence, the high to very high doses are indicated for estradiol monotherapy (i.e., estradiol alone without an antiandrogen). On average, the high dose will suppress testosterone levels by about 90%, to around 50 ng/dL (Wiki; Aly, 2018). However, total values can be influenced by protein changes. This free hormone drives metabolic activity and supports energy production. The thyroid gland is a small butterfly shaped organ in the neck. To use, enter your E2 and T in either SI or US units, then click the button to calculate. In other words, the same dosage in different types of HRT might have more or less of an effect on your body. Keep in mind, though, that not only are these rough equivalencies, but also that your body may react differently to the individual forms of HRT.
