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Too Much of a Good Thing - Selenium: Little More Than in Many 'Multis' Can Trigger Subclinical Hypothyroidism, Less Selenium (25% of the RDA) Cuts 13% Body Fat in 10 Weeks

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Three things make this study special #1 it's human study, #2 it was conducted in a metabolic ward and #3 it didn't use potentially toxic Se supplements If you ask around about how you can accelerate your metabolism, selenium and iodine, which are both important players in the concert of thyroid hormones, are usually among the first supplements to be mentioned. The bad news is: If you are not deficient in one of them, taking copious amounts of either of them may well slow down your metabolism significantly. In view of the fact that the mechanism that triggers this side effect for selenium is a bit more straight forward than it is for iodine, I would like to start this new series with the initially mentioned essential trace element. Learn more about your thyroid , T3 , and T4 at the SuppVersity Green tea messes w/ your thyroid hormones TSH alone is not a good measure of thyroid health Fructose prevents decline of T3 while dieting T2 has thyroid-suppressing ...
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TSH - A Critical Re-Evaluation of Its Non-Significance: Why Your TSH May Tell You Nothing About Your Thyroid Health

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Symptoms of hypo- and hypothyroidism (figure from youngstershub.com)  In previous articles about overtraining I've already touched on the possibility that training too much and eating to little can put you into a state where your TSH levels are low, even if the same goes for your free T3 and free T4 values. Normally, your hypothalamus should correct low levels of the two active thyroid hormone T3 and T4 by increasing TSH. This physiological up-and-down is what doctors use to diagnose hypo- and hyperthyroidism by measuring TSH and in many cases only TSH - text-book practice, but still questionable against the background of the latest science. Learn more about your thyroid , T3 , and T4 at the SuppVersity Green tea messes w/ your thyroid hormones Overfeeding affects thyroid hormones Fructose prevents decline of T3 while dieting T2 has thyroid-suppressing ef-fects as T3 & T4 Dieting makes you "hypothyroid" - temporarily Levothyroxine may not b...
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Study Confirms: Excessive Green Tea Consumption (1-2L) May Reduce Your Thyroid Function (T3, T4) by Almost 50%

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If you drink green tea 24/7 you don't have to wonder if your thyroid is sluggish and your belly growing. I've alluded to the anti-thyroid effects of green tea extracts in previous articles. That simply drinking green tea (albeit excessively) would trigger the exact same effects, though, is news. News I got from a very recent study from the  Zagazig University Faculty of Medicine  in Egypt. The authors, Abulfadle K. A., Bakhaat G. A., Shaik R. and Tantry B. A., studied the effect of excessive green tea intake on body weight and serum thyroid hormones in male mice and compared their results to what happens if the rodents are fed only fluoride and caffeine. Overtraining puts you at a similar risk of low thyroid levels as tons of green tea Female Athletes' Body Comp Suf- fers From Dieting Athlete's Triad is not a female exclusive phen. Athlete's Triad - Analysis of the Vicious Cycle Athlete's Triad - How to Recover Part 1/3 Athlete's Tri...
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High Dose 3,5-Diiodo-L-Thyronine (T2) Has Similar Side Effects as Regular Thyroid Hormones: Natural Thyroid Hormone Production ↓, Myocardial Stress ↑, Heart Weight ↑

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No, the rodents had "only" enlarged hearts, but hairloss is a common side effect of elevated thyroid hormones and could theoretically occur in the long run. You have read about it on the SuppVersity and you've seen it as an ingredient in several recent fat burners... a purportedly 100% save non-suppressive thyroid hormone which goes by the name 3,5-Diiodo-L-Thyronine (T2) . While previous rodent studies highlighted only the beneficial metabolic effects, i.e. increases in fatty acid oxidation and resting energy expenditure, a recent study from the German Institute of Human Nutrition Potsdam-Rehbruecke raises serious concerns about what Wenke Jonas and her colleagues call the "indiscriminate administration of 3,5-T2 as powerful natural hormone for the treatment of hyperlipidemia and pandemic obesity" (Jonas. 2014) - in other words: About using T2 as a weight loss supplement or anti-obesity drug in lean or obese individuals without medical supervision. ...
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Iodine Induced Reduction in Hepatic Deiodinase Activity Leads to Hypothyrodism and the Accumulation of Liver Fat That May Eventually Pave the Way to Diabesity

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While us Westerners think of goitre mostly as a result of iodine deficiency, the Chinese have learned by hard that the opposite is about as likely - goitre in response to iodine in the drinking water is a huge health problem in certain parts of the country (Zheng. 2000) As colorful as the web may have become, it is still full of paradigmatic black-and-white thinking: The world is either black or white and if you browse the blogosphere, it would appear that iodine would certainly belong to the white part of our world. That in exactly those people who are often referred to as an example of the multitude of beneficial health effects, namely the Japanese, a high intake of iodine has repeatedly been shown to be associated with low thyroid function and even full-blown hypothyroidism, on the other hand, is something you will probably not learn from the tons of unreferenced stuff you'll find on the Internet about how good, if not essential it was for your health to take copious amounts...
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(Mis-)Managing Hypothyroidism: 7% Reduction in Energy Expenditure & Fat Oxidation in Patients on Levothyroxine (T4) Mono Therapy. Plus: Alternative Desiccated Thyroid?

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The thyroid is a real diva. You better treat her with utmost care ( learn more ) I guess, ... no, I know that a couple of you have to deal with all sorts of thyroid problems. I know you won't like to hear that, but if you read the SuppVersity Athlete's Triad Series you should know that there is more than just the remote possibility, that food and rest would be everything to "heal" your underactive ductless gland (=thyroid). Good indicators are you train everyday, (1) you eat a high protein, low carb, low to at best medium fat diet with a constant caloric deficit, and (b) your TSH level is low to normal, your free T4 level is low to normal but your free T3 level is sub-par. In consequence you will feel sluggish, look sluggish, train sluggish and won't achieve either your fat loss, performance or muscle building goals. If that's you, there is need for meditation, not medication, for stress management, not pills. In fact, throwing the "inactive"...
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