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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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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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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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Overtraining, Undereating & Self-Inflicted Hypothyrodism: Thresholds for Low T3 and High Reverse T3 Levels at 8% & 15% Reduced Energy Intake + Exercise After Only 4 Days!

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This is not a "woman thing" only and your T3 levels are not the only thing that's going to "fall flat" if you starve yourself through your workouts! Yep, low libido => low total testosterone => low free testosterone => hypogonadism, that's what we are talking about, guys. While I did promise to summarize some of the things, I said about creatine kinase, ALT, AST & Co on the last installment of the SuppVersity Science Round-Up on the Super Human Radio Network (I will do that in a future blogpost), today's SuppVersity article will focus on a single and in my experience often misinterpreted and / or overlooked symptom of overtraining that I personally have encountered numerous times in both male and female trainees: Self-induced hypothyrodism , low T3- or the euthyroid sick syndrome are just a couple of names that have been used in the science and laypress to describe this peculiar result of the way trainees deliberately ruin their metab...
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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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