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Too Much of a Good Thing - Iodine: 1 mg/day + Can be Bad for You, But the Dangers are as Individual as the Benefits

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Seafood is an excellent source of iodine, but many people get most of their iodine from iodized table salt. I assume you would have expected me to forget that I promised to do my very best to turn the "too much of a good thing" article on selenium I wrote a week ago into a series, right? Well, you obviously don't know me well enough, then, because here's installment #2 of this new series. One that is closely related to #1, but was significantly more difficult to write. Why's that? Well, if you took a look at the literature discussing the effects of iodine supplementation on thyroid function, you'd know why it was ... well, "complicated" and not exactly unambigous to say the least. 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 ef-fects as T3 & T4...
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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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Tryptophan, an Overlooked Natural "Anabolic"? Increased Follistatin (Myostatin Inhibitor), mTOR, and IGF-1 In-Vitro and In-Vivo Shed a Whole New Light on Serotonin Precursor

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Poultry is high in tryptophan and so is spirulina, cod, soy beans, parmesan and pork. They all have higher tryptophan contents than turkey. So, it doesn't always have to be poultry ;-) As a SuppVersity  reader you know that "[n]utrition plays a key role in the maintenance of muscle and bone mass, and dietary protein deficiency has in particular been associated with catabolism of both muscle and bone tissue" (Dukes. 2015). You will also be aware that leucine and some other amino acids play a particularly important role in the accrual and maintenance of muscle mass. Until today, l-tryptophan, the amino acid the "happy neurotransmitter" serotonin is not among the usual suspects when it comes to building muscle. If the results of a recent study from the Georgia Regents Univ.  translate into practic-ally relevant research, this may change soon (Dukes. 2015). Learn more about amino acid and BCAA supplements at the SuppVersity Glutamine Helps W/ Diabetes...
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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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